This influential Renaissance-era library was once the haunt of kings and monks.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

A charming beach town in Turkey captures all the colors of the rainbow.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

This demon atop the Notre-Dame de Paris looks utterly bored.

This candy-colored storybook village originated as a 19th-century Methodist campground.

Special benches that play Chopin's music are scattered throughout his native city.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

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

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Where condemned pirates met their grisly end at the gallows on the River Thames.

This mid-century mural portrays humankind's spiritual and scientific journey.

At this Arctic outpost, get to know members of the indigenous Sámi community and meet their herds.

A small island dotted with old, historic Finnish buildings.

This unique, full-sized copy of the Bayeux Tapestry sports a few modern additions, including underwear.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.