A visitor to Superbloom at the Tower of London, takes a selfie among the flowers growing in the moat area of the tower, in London, Britain, July 15, 2022. REUTERS/Peter Nicholls 

A visitor to Superbloom at the Tower of London, looks at flowers growing in the moat area of the tower, in London, Britain, July 15, 2022. REUTERS/Peter Nicholls 

Visitors to Superbloom at the Tower of London, look at flowers growing in the moat area of the tower, in London, Britain, July 15, 2022. REUTERS/Peter Nicholls 

Gardeners sow seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

A gardener sows seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

Gardeners sow seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

Gardeners sow seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls TPX IMAGES OF THE DAY 

A gardener sows seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

Gardeners sow seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

A gardener sows seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

Gardeners sow seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

Gardeners sow seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

A gardener sows seeds into the moat surrounding the Tower of London, that will bloom into a 'Superbloom' display celebrating the Queen's Platinum Jubilee later this year, in London, Britain, March 30, 2022. REUTERS/Henry Nicholls 

A man paints the railings of a moat bridge surrounding an orangerie near Celbridge, Ireland, June 2, 2021. REUTERS/Clodagh Kilcoyne 

Nordic Skiing - FIS Nordic World Ski Championships - Oberstdorf, Germany - February 27, 2021 Tara Geraghty-Moats of the U.S. reacts during the women's nordic combined HS 106 ski jumping competition REUTERS/Kai Pfaffenbach 

Nordic Skiing - FIS Nordic World Ski Championships - Oberstdorf, Germany - February 27, 2021 Tara Geraghty-Moats of the U.S. in action during the women's nordic combined HS 106 ski jumping competition trial round REUTERS/Kai Pfaffenbach 

A swan swims in the moat while an Imperial Palace guard stands in front of a gate at the Imperial Palace in Tokyo, Japan, October 21, 2019. REUTERS/Soe Zeya Tun 

A bicycle of ride-sharing firm Mobike is seen in the partly frozen moat outside the Forbidden City in Beijing, China December 23, 2018. Picture taken December 23, 2018. REUTERS/Thomas Suen 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

The moat of the Tower of London are seen filled with thousands of lit torches as part of the installation 'Beyond the Deepening Shadow', in London, Britain November 4, 2018. REUTERS/Henry Nicholls 

Cherry blossoms and a mustard field are seen at a moat of the Imperial Palace in Tokyo, Japan, April 2, 2018. REUTERS/Toru Hanai 

Visitors ride a boat in the Chidorigafuchi moat covered with petals of cherry blossoms in Tokyo, Japan, April 2, 2018. REUTERS/Toru Hanai 

Visitors take pictures of cherry blossoms in full bloom along the Chidorigafuchi moat in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

Visitors take pictures of cherry blossoms in full bloom along the Chidorigafuchi moat in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

Visitors ride a boat in the Chidorigafuchi moat, as they enjoy fully bloomed cherry blossoms, during spring season in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

Visitors ride a boat in the Chidorigafuchi moat, as they enjoy fully bloomed cherry blossoms, during spring season in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

Visitors ride a boat in the Chidorigafuchi moat, as they enjoy fully bloomed cherry blossoms, during spring season in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

A kimono-clad woman takes selfie photo at the Chidorigafuchi moat, as visitors enjoy fully bloomed cherry blossoms, during spring season in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

Visitors ride a boat in the Chidorigafuchi moat, as they enjoy fully bloomed cherry blossoms, during spring season in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

Visitors ride a boat in the Chidorigafuchi moat, as they enjoy fully bloomed cherry blossoms, during spring season in Tokyo, Japan March 26, 2018. REUTERS/Issei Kato 

A visitor rides a boat in the Chidorigafuchi moat covered with petals of cherry blossoms in Tokyo, Japan, April 13, 2017. REUTERS/Toru Hanai 

Visitors ride a boat in the Chidorigafuchi moat covered with petals of cherry blossoms in Tokyo, Japan, April 13, 2017. REUTERS/Toru Hanai 

A cleaning worker wades in the moat surrounding the Imperial Palace in Tokyo, Japan July 14, 2016. REUTERS/Toru Hanai 

Cleaning workers wade in the moat surrounding the Imperial Palace in Tokyo, Japan July 14, 2016. REUTERS/Toru Hanai 

A cleaning worker wades in the moat surrounding the Imperial Palace in Tokyo, Japan July 14, 2016. REUTERS/Toru Hanai 

Thane Maynard, Executive Director of the Cincinnati Zoo and Botanical Gardens, speaks to reporters at the Cincinnati Zoo's Gorilla World exhibit reopening after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

Thane Maynard, Executive Director of the Cincinnati Zoo and Botanical Gardens, speaks to reporters at the Cincinnati Zoo's Gorilla World exhibit reopening after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

The Cincinnati Zoo's Gorilla World exhibit reopens after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

The Cincinnati Zoo's Gorilla World exhibit reopens after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

The Cincinnati Zoo's Gorilla World exhibit reopens after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

The Cincinnati Zoo's Gorilla World exhibit reopens after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

The Cincinnati Zoo's Gorilla World exhibit reopens after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

The Cincinnati Zoo's Gorilla World exhibit reopens after a boy tumbled into its moat May 28 and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. June 7, 2016. REUTERS/William Philpott 

Flowers lay around a bronze statue of a gorilla and her baby outside the Cincinnati Zoo's Gorilla World exhibit, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

Thane Maynard, Executive Director of the Cincinnati Zoo and Botanical Gardens, speaks to reporters two days after a boy tumbled into a moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

Thane Maynard, Executive Director of the Cincinnati Zoo and Botanical Gardens, speaks to reporters two days after a boy tumbled into a moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

Thane Maynard, Executive Director of the Cincinnati Zoo and Botanical Gardens, speaks to reporters two days after a boy tumbled into a moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

The entrance to the the Cincinnati Zoo's Gorilla World exhibit is closed, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

A mother and her child visit a bronze statue of a gorilla outside the Cincinnati Zoo's Gorilla World exhibit, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

A person places a photo on a memorial during a vigil outside the Cincinnati Zoo and Botanical Gardens, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

People attend a vigil outside the Cincinnati Zoo and Botanical Gardens, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

People attend a vigil outside the Cincinnati Zoo and Botanical Gardens, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott 

People attend a vigil outside the Cincinnati Zoo and Botanical Gardens, two days after a boy tumbled into its moat and officials were forced to kill Harambe, a Western lowland gorilla, in Cincinnati, Ohio, U.S. May 30, 2016. REUTERS/William Philpott