World in 60 - Episode 35

Some people live in a place where the sun doesn't rise for weeks.

During polar night, entire towns stay in darkness. This is World in 60.

Here are five incredible facts from around the world. In China, there's a bridge

made entirely of glass. It hangs hundreds of meters above the ground and

cracks on purpose. In Bolivia, there's a lake so salty you can't sink in

it. The water is denser than the Dead Sea. In Russia,

there's a city built on permanently frozen ground. Buildings sit on stilts to stop

the heat from melting the ice below. And in Africa, there's a desert