Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

A striking symbol of the Bulgarian capital.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

This historic black and white monastery is one of Bulgaria's architectural jewels.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

An abandoned saucer-shaped monument in the Bulgarian mountains.

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 world's largest pineapple building honors Bathurst's favorite fruit.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

This colonial fort is an intriguing example of Renaissance military architecture.

Road signs in Namibia mark the location of one of the five major circles of latitude.

This picturesque island graveyard is the final resting place of dozens of notorious pirates.

The runoff from these fiery cliffs sends red water flowing into the sea.

Stunning ruins of what was once the center of one of the greatest empires in East Africa.

A stone memorial marks the spot where the fighting of World War I finally ceased—three days after the armistice was signed in Europe.

A memorial marks the spot where a plane crash killed several United Nations members on a peace mission to the Democratic Republic of the Congo.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.