A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

One man's stunning attempt at eco-friendly living.

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

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

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

Walk behind a 50-meter-high waterfall.

A little Lady Liberty stands in the Norway town where the copper for the real thing came from.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

No need to strap in for a "ride" on this walkable roller coaster.

This former steel and coal plant is now a neon-lit industrial fantasia.

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

Dutch woodpile home in the forest.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

This unattributed sculpture in Amsterdam is hiding in plain sight.

The world's only museum devoted to the wonders of fluorescence.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.

This haunting stone chasm is a hotbed of mossy rock and English legend.

The remnants of a depressing public toilet are now a hub of ever evolving street art.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

The heads of two giant mythological water horses honor Scotland's horselord past.