An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

The ceiling of this cavern is dripping with multicolored marble stalactites.

This 15th-century Ottoman bridge was modified to keep up with the changing course of the river Erenik.

Half of the Pulitzer Prize-winning author's ashes were buried in Armenia.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

Towering high above the neighborhood of La Candelaria, the church is easily recognizable by its distinctive red-and-white striped facade.

The largest and, arguably, most scenic fortress in Bhutan.

This garden is very fertile.

The collection includes seven one-of-a-kind automobiles, vintage fashion, and more.

The only house built with a turret, crenellations, and a moat in Palmer, Alaska.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

World's oldest and largest space launch facility, once a secret missile testing site.

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

A Stalinist prison camp for the wives and children of men accused of betraying the Soviet state is now a memorial museum.

This ancient town is full of stunning Ottoman architecture and streets so narrow trash collection is done by donkey.

A dreamy mausoleum honors Persia's most famous poet.

These little castles each held thousands of pigeons.

Rocky Atlantic beach home to a stunning stone arch.

More than 1,000 stone figures were discovered in a small Nigerian town, where they had been sitting for centuries.

Slum Settlement Filled With Mountains of Garbage.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

According to one local legend, this image was created during a battle between a wild lioness and the archangel Michael.