This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

An idyllic hotel that gave its name to a supposed shadow government.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This mysterious pig iron pillar does not rust, despite being weathered by the elements for centuries.

Europe's oldest still-operational tea farm also boasts a spectacular view.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

Legendary site where an evil bishop was devoured by rodents.

Tiny castle in the middle of the Rhine made you pay to pass.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

After years of being casually peed on by humans, this tree is peeing back.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

A ruined castle stands atop a hill surrounded by dragon lore.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Model Trains and Much More in Hamburg.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Hamburgers are intensely proud of their tunnel beneath the river.

Cold war icon and onetime "hole" in the iron curtain.