A tourist visits the Oktyabrskaya cave of the Bogdanovich glacier located in the Tian Shan mountain range near Almaty, Kazakhstan February 20, 2021.Prevented from travelling abroad by the pandemic, Kazakhs are flocking to the magnificent glaciers of the Tian Shan mountain range near their country's biggest city, Almaty. REUTERS/Pavel Mikheyev

A tourist visits the Oktyabrskaya cave of the Bogdanovich glacier located in the Tian Shan mountain range near Almaty, Kazakhstan February 20, 2021. Kamirasov takes visitors to the Bogdanovich glacier 3,500 metres (11,500 feet) above sea level and featuring a bowl-shaped formation which some have used to produce otherworldly landscape photographs. REUTERS/Pavel Mikheyev

A tourist visits the Oktyabrskaya cave of the Bogdanovich glacier located in the Tian Shan mountain range near Almaty, Kazakhstan February 20, 2021. The glacier is dwindling due to global warming. Kamirasov says its lowest point has retreated about 1.5 km (1 mile) since he first visited it about 30 years ago. REUTERS/Pavel Mikheyev

A tourist visits the Oktyabrskaya cave of the Bogdanovich glacier located in the Tian Shan mountain range near Almaty, Kazakhstan February 20, 2021. REUTERS/Pavel Mikheyev

A tourist is seen on the Bogdanovich glacier located in the Tian Shan mountain range near Almaty, Kazakhstan February 20, 2021. REUTERS/Pavel Mikheyev

A tourist poses for a picture on the Bogdanovich glacier located in the Tian Shan mountain range near Almaty, Kazakhstan February 20, 2021. REUTERS/Pavel Mikheyev