The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

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

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

Amsterdam's former hotspot for public executions and dissections.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This unusual elevator doesn’t stop or slow down.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

The attic of a four-century-old canal house hides a clandestine church.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A downtown park built on top of unclaimed graves.

The first piece of public art dedicated to LGBT rights.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

Iceland's first pagan temple in 1,000 years is underway in Reykjavík.

This museum dedicated to divination also honors a local 10th-century prophetess.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

This fairytale-like structure is the last turf church ever constructed in Iceland.

This replica Viking village was created for a film that was never shot and is now open to visitors.

The oldest church in Iceland is one of the few to feature ornate decoration.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

Climb right into the heart of this colorful Iceland volcano.