A house carved into a rock in the 1940s.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

World War II bunker still standing on the New Jersey beach.

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

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

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

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

Europe's official "zero-level," the equator of elevation.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

This unusual elevator doesn’t stop or slow down.

This unattributed sculpture in Amsterdam is hiding in plain sight.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This cheese shop also houses a museum devoted to Dutch dairy.

The history and future of cannabis.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The world's only museum devoted to the wonders of fluorescence.

Rumored to have been frequented by Vincent van Gogh, it's the only remaining genever producer in the Hague.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.