This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

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

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

An oasis of shade and color amidst the bustle of the old city.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

The remains of three different ancient civilizations have been found at this rich archaeological site.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

In this 400-year-old hotel in Madrid, you'll find a comb in every room, an old clock, and maybe a ghost.

An automaton perched above an classic clock and watch store

Automatons that were once removed after one fell from the building.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

The remains of a convent turned military barrack in the heart of Madrid.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

An ancient Egyptian temple in the middle of Madrid, Spain.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.