This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

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

Sacred Buddhist home of some spiritual monkeys.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

This golden temple is surrounded by hundreds of stone tablets that comprise the "world's largest book."

A grand example of 19th century Burmese teak architecture, and the most significant of Mandalay's historic buildings.

The oldest teak bridge in the world is made from the remains of a royal palace.

A grand imperial capital left to fall into magnificent ruin.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The palace of the King of Kings, burned by Alexander the Great.

A battle between nature and architecture in the Cambodian jungle.

The fairy tale castle of the "fairy-tale king."

A seemingly endless landscape of pure salt stretches far across Bolivia.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

The vast, legendary catacombs hold secrets much stranger than stacked bones.