A man crosses Blackfriars Bridge at sunset during the coronavirus lockdown.

A bus crosses Blackfriars Bridge at sunset during the coronavirus lockdown.

A runner crosses Blackfriars Bridge at sunset during the coronavirus lockdown.

A man runs across the Millennium Bridge, spanning the River Thames during the coronavirus lockdown.

The Millennium Bridge spanning the River Thames during the coronavirus lockdown.

The Millennium Bridge spanning the River Thames during the coronavirus lockdown.

A man uses a cane stick to fish in a pond on the banks of the Kafue River. Female Genital Schistosomiasis (FGS) is a waterborne parasitic disease affecting women. Symptoms include lesions on the cerv...

The Boiling Pool at the foot of Victoria Falls. In the background is the bridge connecting Zambia and Zimbabwe.

Drug addicted people squat among the detritus beneath the Pul-e-Sukhta bridge (Pul-i-Sokhta) where, one estimate claimed, up to 1000 drug users regularly gather.

A drug addicted man searches for recyclable items, to pay for his habit, among the detritus beneath the Pul-e-Sukhta bridge (Pul-i-Sokhta).

Drug addicted man lie among the detritus on the dry river bed beside the Pul-e-Sukhta bridge (Pul-i-Sokhta) where, one estimate claimed, up to 1000 drug users regularly gather.

A drug addicted man squats among the detritus beneath the Pul-e-Sukhta bridge (Pul-i-Sokhta) where, one estimate claimed, up to 1000 drug users regularly gather.

Drug addicted people squat among the detritus beneath the Pul-e-Sukhta bridge (Pul-i-Sokhta) where, one estimate claimed, up to 1000 drug users regularly gather.

A drug addicted man smoking heroin beneath the Pul-e-Sukhta bridge (Pul-i-Sokhta) where, one estimate claimed, up to 1000 drug users regularly gather.

Drug addicted people smoking heroin and methamphetamine beneath the Pul-e-Sukhta bridge (Pul-i-Sokhta) where, one estimate claimed, up to 1000 drug users regularly gather.