Walk 2,300 feet above the ground on the "Troll's Tongue."

A serpentine highway twists and turns over the treacherous Norwegian Sea.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A musical instrument played by the sea.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

Largest lake in Great Britain measured by surface area.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

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

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

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