Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 24th Pol'and'Rock Festival (former Woodstock) in Kostrzyn-upon-Odra, Poland August 2, 2018. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland, August 5, 2017. REUTERS/Kacper Pempel 

Revelers dance during the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland, August 5, 2017. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY 

Revelers take part in the 23rd Woodstock Festival as rainbows appear in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

An aerial view shows revelers taking part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival as rainbow appears in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Reveler bungee jumps during the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

A aerial view shows revelers taking part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers dance during the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers take part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

An aerial view shows revelers taking part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

A reveler sits on a tree during the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

An aerial view shows revelers taking part in the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Revelers crowd surf during the 23rd Woodstock Festival in Kostrzyn-upon-Odra, Poland August 5, 2017. REUTERS/Kacper Pempel 

Reveler plays in a mud pit during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

A reveler showers as he plays in a mud pit during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

Revelers dance after taking part in beating the Guinness World Record of painted bodies in one time during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

A newly married couple poses during a photo session near the main stage at the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 30, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. The word on the wall in the background reads:" Love, Friendship". Picture taken July 30, 2015. REUTERS/Kacper Pempel 

Revelers play in a mud pit during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

A couple kisses while taking a shower in a mud pit near the main stage during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY

A bird's-eye view shows people at a concert at the main stage during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

Revelers dance after taking part in beating the Guinness World Record of painted bodies in one time during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

A reveler dressed as Batman bungee jumps during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

A bird's-eye view shows a camp site during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

A general view of the main stage is seen during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

Revelers dance after taking part in beating the Guinness World Record of painted bodies in one time during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 31, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. REUTERS/Kacper Pempel 

Revelers dance as they listen to the music in front of the main stage during the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 30, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. Picture taken July 30, 2015. REUTERS/Kacper Pempel 

A man with a mohawk attends the 21st Woodstock Festival in Kostrzyn-upon-Odra, Poland July 30, 2015. An estimated 200,000 people attended the ongoing festival, a brainchild of Polish journalist and social campaigner Jerzy Owsiak, on Friday. Owsiak initiated the event to say thank you to those who donated money to his GOCC charity organisation that delivers medical care for children. Picture taken July 30, 2015. REUTERS/Kacper Pempel