The remains of this 2nd-century Roman temple are incorporated into a modern building.

This subterranean studio is filled with fascinating kinetic art.

This cheese shop also houses a museum devoted to Dutch dairy.

The history and future of cannabis.

Cat art as far as the eye can see.

The world's only museum devoted to the wonders of fluorescence.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

An alien church provides much needed silence in the midst of a Finland shopping center.

The world's biggest floating museum in Gothenburg, Sweden.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This charming candle shop has been in business since 1789.

“It has nae lugs!”

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Immortal combat in a Moscow museum.

A boulder carved into the shape of the cosmonaut's head.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

Massive, unfinished broadcasting station stands as a monument to the fall of communism.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

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

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

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

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

An abandoned saucer-shaped monument in the Bulgarian mountains.

Gigantic Romanian salt mines used to heal respiratory conditions.