Iceland's largest lagoon is home to stunning multi-colored icebergs.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

Over 4,700 miles of trees being planted to hold back the desert.

The largest stone moai on Rapa Nui.

This was once the center of the Birdman cult, and is now a World Heritage Site.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

Many cities have held the title, but Brazil snatched the crown from Chile in 2011.

The most confusing clock in New York.

Series of storm drains connected to a dark urban legend.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The largest drain hole in the world.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

Special tunnels built so that frogs won't be killed when crossing the highway.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

The smallest country in the world.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

Elevated freight railway turned wildly successful urban park.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

A Memphis park where you can walk the whole Mississippi River in one go.