Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

What happens when you cross a mayor and a painter?

A museum dedicated to secret surveillance.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

Where a Japanese government official issued transit visas to Jews fleeing from Nazi-occupied Poland.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

Folky pharmaceuticals abound in this medicinal reliquary.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

The oldest funicular in Lithuania has been climbing this steep hill since 1931.

Ever-growing collection of devils in art.

Something's watching you.

An early creation by Erich Mendelsohn.

Gliwice Radio Tower, likely the tallest wooden structure in the world.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A colorful square marks the heart of the city's LGBTQ community.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

The only subterranean ping pong table in Atlanta.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This church is named for one of the most dramatic tales in the early Christian church.