An urban forest overtakes what was the greatest failure of utopic urban housing.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

An iconic location along the Los Angeles River where countless movie scenes are filmed.

An unsettling sculpture of a boy hanging out in a street in Ghent has been baffling visitors for years.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The bronzed skull of a beheaded traitor was affixed to the city gate in the 17th century.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

A beer pipeline runs beneath Bruges.

Lavish royal estate punctuated with heated greenhouses.

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

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

A little sculpture with a large wardrobe.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

A public urinal so pretty, it was declared a national monument.

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.

A giant bug impaled on a 75-foot-tall needle.