Tourists visit Samalayuca dunes to practice sandboarding in the Chihuahua desert on the outskirts of Ciudad Juarez, Mexico, August 5, 2017. REUTERS/Jose Luis Gonzalez

Tourists visit Samalayuca dunes to practice sandboarding in the Chihuahua desert on the outskirts of Ciudad Juarez, Mexico, August 5, 2017. REUTERS/Jose Luis Gonzalez

A tourist visits Samalayuca dunes to practice sandboarding in the Chihuahua desert on the outskirts of Ciudad Juarez, Mexico, August 5, 2017. REUTERS/Jose Luis Gonzalez

Tourists visit Samalayuca dunes to practice sandboarding in the Chihuahua desert on the outskirts of Ciudad Juarez, Mexico, August 5, 2017. REUTERS/Jose Luis Gonzalez

Tourists visit Samalayuca dunes to practice sandboarding in the Chihuahua desert on the outskirts of Ciudad Juarez, Mexico, August 5, 2017. REUTERS/Jose Luis Gonzalez

A man sand boards in Wadi el-Rayan Fayoum, Egypt. November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

A man climbs to sand board in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

A man sand boards in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

A man sandboards down the mountain in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

A woman sandboards on the mountain in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

A man sandboards down the mountain in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

A man falls down while sandboarding in Wadi el-Rayan Fayoum, Egypt, November 18, 2016. Picture taken November 18, 2016. REUTERS/Mohamed Abd El Ghany

U.S. sandboarder Matt Walton soars in Al Katania dunes, about 80 km (50 miles) southwest of Cairo, January 18, 2010. Walton is in Egypt to conduct sandboarding lessons. REUTERS/Tarek Mostafa (EGYPT - Tags: SOCIETY TRAVEL)

U.S. sandboarder Matt Walton soars in Al Katania dunes, about 80 km (50 miles) southwest of Cairo, January 18, 2010. Walton is in Egypt to conduct sandboarding lessons. REUTERS/Tarek Mostafa (EGYPT - Tags: SOCIETY TRAVEL SPORT SNOWBOARDING IMAGES OF THE DAY)

U.S. sandboarder Matt Walton slides in Al Katania dunes, about 80 km (50 miles) southwest of Cairo, January 18, 2010. Walton is in Egypt to conduct sandboarding lessons. REUTERS/Tarek Mostafa (EGYPT - Tags: SOCIETY TRAVEL)

Tourists prepare to sand-board in the Cerro Negro volcano in Leon City, about 75 miles (120 kilometers) northwest of Managua May 26, 2009. The volcano, with a height of 2,264 feet (690 meters), is one of the most active in Nicaragua. REUTERS/Oswaldo Rivas (NICARAGUA SOCIETY TRAVEL)

Anry Ramirez of tour company Tierra Tours, sand-boards at the Cerro Negro volcano in Leon City, about 75 miles (120 kilometers) northwest of Managua May 26, 2009. The volcano, with a height of 2,264 feet (690 meters), is one of the most active in Nicaragua. Hundreds of tourists visit the area to "sand-board" down the slopes of the volcano. REUTERS/Oswaldo Rivas (NICARAGUA TRAVEL SOCIETY)

Tourists walk after sand-boarding in the Cerro Negro volcano in Leon City, about 75 miles (120 kilometers) northwest of Managua May 26, 2009. The volcano, with a height of 2,264 feet (690 meters), is one of the most active in Nicaragua. Hundreds of tourists visit the area to "sand-board" down the slopes of the volcano. REUTERS/Oswaldo Rivas (NICARAGUA SOCIETY TRAVEL)

Anry Ramirez, a staff of tour company Tierra Tours, "sand-boards" at the Cerro Negro volcano in Leon City, about 75 miles (120 kilometers) northwest of Managua May 26, 2009. The volcano, with a height of 2,264 feet (690 meters), is one of the most active in Nicaragua. Hundreds of tourists visit the area to "sand-board" down the slopes of the volcano. REUTERS/Oswaldo Rivas (NICARAGUA TRAVEL

SOCIETY)

An Egyptian boy sand-boards in Al Katania dunes, about 80 km (50 miles) southwest of Cairo, March 27, 2009. REUTERS/Tarek Mostafa (EGYPT SPORT TRAVEL IMAGE OF THE DAY TOP PICTURE) FOR BEST QUALITY IMAGE: ALSO SEE GF2E53V0X9I01

A tourist sandboards down a dune in the Dubai desert April 10, 2007. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES)

A tourist sandboards down a dune in the Dubai desert April 10, 2007. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES)

A tourist sandboards down a dune in the Dubai desert April 10, 2007. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES)

A tourist sandboards down a dune in the Dubai desert April 10, 2007. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES)

Tourists prepare to sandboard down a dune in the Dubai desert April 10, 2007. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES)

Snowboarders skim the water surface during the Sandboarding World Championships at the 'Monte Kaolino' near Hirschau, Germany. Snowboarders skim the water surface during the 15th Sandboarding World Championships at the 'Monte Kaolino' near the northern Bavarian town of Hirschau June 25, 2005. The sand is a waste product of kaoline (a soft white clay used to make fine porcelain, bricks and cement). The mound of kaoline is produced at a nearby facility and used for skiing and snowboarding during the summer. REUTERS/Alexandra Winkler