This historic Canadian jail was once the longest operating prison in the country and is now open for people to incarcerate themselves.

The metal truss bridge served as the sole entry point to an "isolation island" for smallpox outbreaks throughout the 1870s and early 1940s.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Now a public art piece, this curious metal feature originally advertised a tinsmith's services.

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

This inexpensive lodging house was once a prison notorious for its inhumane practices.

These prehistoric replicas were based on actual skeletal remains.

A memorial to 350 people burned at the stake for witchcraft.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

A 20th-century naval quarantine center is now a local park.

A bridge that has seen many reiterations over its lifetime.

A condensed piece of China floating in a Dutch harbor.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

Where royalty waits in the height of luxury.

The former headquarters of history's oldest megacorporation.

The facade of this bank has changed little over the centuries, including its unique welcome sign.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A public urinal so pretty, it was declared a national monument.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

In 1988, jazz legend Chet Baker fell to his death from a window of this hotel facing Amsterdam Centraal.

This historic Amsterdam bar used to accept sailor's monkeys as payment.