Water

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

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

A small island hides in plain sight on Austin's Lady Bird Lake.

"The Donut" was built as part of an expensive, ill-fated engineering endeavor.

The watery grave of an impractical idea.

This rare basalt crater lake is used to study the Moon and Mars.

This stretch of the River Severn where large waves flow against the current is the birthplace of river surfing.

The 20-mile causeway that separates the Netherlands from the sea.

A bright and wacky exhibit answers every question you may have had about human excrement, flatulence, and more.

The only way to visit this old resort hotel is with scuba gear.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

A World War II-era submarine is stuck in the mud in New Jersey.

Nature's water park in the Wadi Bani Awf valley is full of pools flanked with cliffs and natural water slides.

The world's first successful water-powered cotton mill paved the way for the factories of the British Industrial Revolution.