Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This small chapel built into rock is the oldest place of worship in Luxembourg.

At the time of its construction, this hydroelectric power plant was the largest in the world.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

The name Niarbyl means “the tail” and refers to the rocky formations that push out into the Irish Sea.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

This unique sculpture is often overlooked by pedestrians.

A 130-year-old urinal is the oldest of Stockholm and perhaps all of Sweden.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

Amsterdam's former hotspot for public executions and dissections.

A museum dedicated to the tragedy of Bloody Sunday.

This hidden bridge is where local children leave gifts and messages for the island's fay folk.

This Victorian water wheel is affectionately nicknamed "Little Isabella."

A 150-year-old steam locomotive crosses the southern half of the island daily.

World's largest working waterwheel has been around for over 150 years.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

This "grandfather" eucalyptus is one of the tallest trees in Europe.

This enormous censer uses a pulley system installed over 400 years ago.