One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

A building so large that it has its own weather.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Quite simply the largest tree in the world (by volume).

A battle between nature and architecture in the Cambodian jungle.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

An extravagant monument to an extravagantly unpopular Emperor.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A beer pipeline runs beneath Bruges.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

A moving memorial to the fallen and missing from WWI trenches.

A little sculpture with a large wardrobe.

Theme park featuring miniature replicas of European monuments.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

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

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Lavish royal estate punctuated with heated greenhouses.