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

These quaint French houses dangle precariously over a precipice.

Rare karst landscape eroded from a flat seabed.

The world's largest wooden structure.

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Hear the quietest sound from across the dome.

Giant, friendly pelicans in Central London, the most unlikely of places.

A giant gorilla made of used car tires used to sit sentinel over a Helsinki college campus.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Pull up and have a drink at a museum filled with hundreds of years worth of shipwreck artifacts.

This Dutch statue is a monument to the fictional shrew who brought doom to the city of Stavoren.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

An ancient ossuary in Rouen.

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

A little sculpture with a large wardrobe.

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

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Oldest Museum of the Netherlands is a true cabinet of curiosities.