An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Mysterious craters may have been home to an ancient cult.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

"There's nothing there," and other lies the KGB told us.

This roadside monument commemorates the huge weapon built by an Ethiopian emperor's hostages.

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

Rusting railcars and locomotive equipment fill this Ethiopian train graveyard.

The Earth's saltiest natural body of water belches toxic gas.

The skeletal remains of the famous hominid "Lucy" were found at this spot.

An ocean in the making, in the Ethiopian desert.

Massive stele returned to Ethiopia after 70 years in Rome.

Supposedly this Ethiopian chapel holds the Ark of the Covenant, guarded by virgins who cannot leave the building.

An Ethiopian cloud forest protects some of the last wild arabica plants.

Reaching the "Church in the Sky" requires scaling the cliff face of a sandstone pinnacle with a 650-foot drop.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

The hottest place on the planet.

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

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

This unusual hostel provides a glimpse of life in a city under siege.

A 16th-century mosque rebuilt after wartime devastation.

Two bulls enter. One leaves a champion—but neither loses its life.

An apparition of Virgin Mary in Herzegovina.

A field filled with carved medieval tombstones called stećak.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.