Hundreds of protractors affixed to surfaces all over the city.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

The longest and tallest aqueduct in Britain can actually be sailed across.

Perfect your fly fishing technique on their practice ponds.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

This lake-bound geographical marker sits at the point where three European countries intersect.

The stately remains of Llywelyn the Great's mighty fortress.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

Four alabaster giants contemplate the tides on the shore of Denmark.

This natural spring not only claims to heal the wounded but it has also been willed to God.

Artifacts showcasing the witchy history of Zambia.

A fake town founded by Western movie stars is now becoming a hip desert community.

This shack nestled in a 120-acre forest of maple trees in Mont-Rigaud is a wonderland of sugary syrup.

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

The home of a neoclassical master is now a shrine to his chosen art style.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.