The "dragon babies" of southeastern Europe.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A miniature train-ride through Slovenia's largest cave system.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The plague quarantine island home to the alleged "Vampire of Venice."

This 15th-century church houses priceless works of art from a range of Croatian artists.

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.

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

The place to be if you love vintage Swedish cars.

Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Copenhagen's celebrated theme park and gardens.

This coffee shop lies hidden beneath a historic church.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Catacombs turned marketplace.

A sharp bend in a dramatic river canyon cut through red rocks.