This unattributed sculpture in Amsterdam is hiding in plain sight.

A set of seven houses, each built in a style that represents a European country.

This plaque marks the former home of one of the first women physicians in the Netherlands.

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

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

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

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

Museum preserving torture methods from the past.

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

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

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

The well-preserved remnants of a bridge that once made up a WW1-era military railroad.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

A local prank turned town icon.

This beach pool offers a spectacle of crashing waves, blue hues, and a historical lighthouse.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This museum preserves the heyday of Puerto Rican coffee.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

This church is known as "The Home Church of George Washington and George Mason."