The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

One of the largest underground systems runs under Canada's largest urban center.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

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

A nuclear reactor created for Eisenhower's "Atoms for Peace" campaign is now used for research at a Dutch university.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

Portraits of musicians line Oude Binnenweg, the jazziest street in the city.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.

A strangely curved lamppost stands tall over this avenue in Rotterdam.

Inside this metro station is a section of the city's former medieval fortification.

Europe's first floating restaurant is home to a hilarious legend.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

Ship-sized kinetic sculptural fantasy.

An architectural oddity hides in plain sight on this iconic London bridge.

The oldest working mechanical clock in the world.

Famously misunderstood wonder of the ancient world

The Bristol Camera Obscura housed in an ancient windmill.

Banksy's image of a naked man dangling from the window of a sex health clinic.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.