A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

One of Europe's oldest yew trees has lived more than 2,000 years.

A long strip of fossil-filled limestone makes up this natural bridge above a rushing stream.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

This tiny watering hole claims to have the smallest bar counter in Europe.

This overlooked gem outside Niagara Falls preserves and celebrates Iroquois culture.

A medieval military street hidden beneath a charming French fishing village.

A historic observatory precariously perched at the "Top of Europe."

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

Sleep in a glass pod dangling off a cliff.

Running since 1864, this clock has yet to be wound, one of the longest-running science experiments known.

These quaint French houses dangle precariously over a precipice.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

An impressive collection is dedicated to the legendary beast.

A grand mansion in rural mid-Wales gifted to the Welsh people by two sisters.

Experience this Iron Age village the way that its original residents would have.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

A botanical garden full of thought-provoking contemporary sculptures.

Stunning Roman aqueduct used for 1900 years and still standing.

An elaborately decorated house sits on an otherwise quiet street.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.