This bone-filled cave got its name after they found 140 bear skeletons inside.

This snug medieval lane is one of the narrowest streets in the world.

The Natural History Museum that time forgot.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

A muddy alien landscape that is home to rare species of exotic plants.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

A giant portrait of an ancient king looms over the river.

This once-derelict building is now one of the most beautiful bookstores in the world.

The romantic botanic tunnel feels like a well-kept secret.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

Architectural monsters are devouring this palace's every door and window.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

A burial vault located under Tiber Island in the middle of the Italian capital.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

This is the oldest Roman-made bridge in the city still existing in its original state.