The world's second-tallest flagpole stands proud despite dropping rank.

340-foot statue built to honour the Heroes of the Soviet Union.

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

An underground city of salt.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

The remains of what was, not so long ago, the world's largest city.