Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

This floating sculpture of ice is a poignant reminder of nature's power.

The world's most important buildings shrunk to a tiny size.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

A fantastic castle rumored to be the birthplace of King Arthur.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

France's most famous cemetery, with some of its most curious tombs.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.

A delightful but little-known public observatory and planetarium in Munich.

The telescope that discovered Neptune.

The unusually large seat sits atop the base of a ruined temple.

The taxidermy remains of the first brown bear to enter Germany in 170 years.

Four-story slides send people whizzing through the math department at this Munich university.

Tiny memorials honor individual victims of the Holocaust.

A small square plaque marks a failed assassination attempt that could have changed history.

In this truly magical place, rent hasn't been raised since the year 1520.