This interactive sculpture allows visitors to leave a message in case a friend passes by.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

Hidden along this old street in Antwerp is a surreal monument of a bronze arm sprouting four hands.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

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

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

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

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

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

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

A medieval castle in the middle of rural Texas.

The only airport with a people mover system designed by Walt Disney Imagineering.

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

At 207 feet, one of the world's longest continuous escalators.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.