Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Built entirely of interlocking pieces, construction of this Chinese Muslim house of worship required zero nails.

According to myth, there's a bloody explanation for the beautiful bright red color of this rock formation set amidst alpine vegetation.

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

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Ancient barriers wrap around what was once an important stop along the Silk Road.

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

An underground city of salt.

A fiery crater has been burning in the Karakum Desert since 1971.

The best-preserved beehive tombs in Oman with spectacular backdrop.

These 4,000-year-old tombs form a surreal landscape.

Hundreds of tree trunks and Welwitschia flowers populate this living fossil haven.

An ancient Namibian rock pictograph of a white lady is actually a man.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

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

The remains of diamond fever taken over by the desert.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.