This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

Putting the "mod" in "modular" since 2000.

An architect transformed this abandoned cement factory into his castle-like workshop.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

The unbelievably opulent home built for an infamous newspaperman.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A huge maze complex and whimsical miniature village in Tasmania.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

One man's swirling six-acre monument of stone.

A winding, blood-red tunnel of hardened lava navigable by foot.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

Plot your trip through the city on the sidewalk.

An intricately carved Viking church overlooks a glistening fjord.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Take a giant yellow bird cage to the top of Elba's highest mountain.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

Medieval ruins on a tiny island amid a flooded lake offer romantic respite to lovers seeking privacy.

Petrified footprints of one of the very first vertebrates to walk on land.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A part of the world's largest marsh seems to be growing bright red Martian grass.