This former railway facility is the oldest in Slovenia, and now houses a museum showcasing the history of steam locomotives.

A public work of art that also provides some relief from the summer heat.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

Colorful power station with a chimney equipped with a gallery for exhaust monitoring equipment.

This abandoned Slovenian military barracks has become a punky-political art squat.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

A cemetery for Slovenian notables also serves as a popular recreation space.

Strange rumors surround the artist who created these solemn metal guard dogs.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A whimsical bridge adorned with decorative dragons.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

One of the most photographed locations in the entire city.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

An abandoned Byzantine fortress and notorious prison.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

These temples are among the oldest free-standing stone buildings in the world.

This 50-foot-deep sinkhole created in the 14th century is home to rare plants and fungi.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

This unique building in the main square stands out among the city's typically Baroque architecture.

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

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.