Site of a classic 19th-century physics experiment to prove the earth is rotating.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

More than 5,000 contemporary and "historic" mustards from around the world.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The original shop where the iconic Belgian praline was invented.

Belgium’s famous peeing statue has worn many hats (and coats, and pants), which are on display at this small museum.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Climb inside an iron crystal magnified 165 billion times its normal size.

This medieval city gate is now a blend of the past and the modern world.

This monumental fountain has moved around the city multiple times.

A devastating landslide accidentally created this tourist hotspot.

Wisconsin's most celebrated export gets the royal treatment on I-94.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

This museum is dedicated to the most famous Irish writers in history.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.