Hidden in the woods behind this English estate lies a Victorian pet cemetery.

What happens when you cross a mayor and a painter?

This one-time health resort was used by aristocrats around the world.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

An abandoned saucer-shaped monument in the Bulgarian mountains.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Geothermal waterfalls in Tuscany.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

This abandoned Slovenian military barracks has become a punky-political art squat.

An isolated village literally built into the crevices and rock formations of a mountain.

An abandoned resort in North Macedonia is a relic from the Communist Party of Yugoslavia.

A 16th-century horror show built in a lovely Italian garden.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

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.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

Houses are tucked between, on, and underneath giant boulders.

Ghosts of France's colonial past.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.