The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

Eastern Bloc nostalgia, anybody?

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

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

Where commuters walk through remnants of an ancient Greek necropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Stockholm's deepest subway station is also a stunning ecological wonder.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

One man's labor of love, Amman's oldest home has become a time capsule with its doors permanently open to artists and guests.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.