In the days before house numbers, these colorful signs held clues about various buildings' purposes.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

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

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

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

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

Museum preserving torture methods from the past.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The most loyal of little dogs, or a Victorian era publicity stunt?

A sweet symbol marks the place where torturous executions were once carried out.

The heads of two giant mythological water horses honor Scotland's horselord past.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A massive sea stack famous for its appearance in The Goonies.

This frequently-photographed waterfall takes only a short hike to visit.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.