Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Commemorating the spot where the famous scientist fed his pigeons.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Wine bottle sculpture with a ship's stateroom inside.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Southern Mexico under the influence of mushrooms, ceremony and celebrity.

During its heyday, the massive estate boasted its own railroad station and post office.

Concrete construction materials turned into a fashionable capsule hotel in rural Mexico.

Huge hole looks down onto an underground beach populated with sea lions.

Mexico's first public cable car soars over the congested streets outside Mexico City.

Inside this mountain lies several kilometers of breathtaking caves.

A dark tunnel leads to a striking white crater that seems to be from another planet.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

This fantastical house shaped like a seashell brings aquatic design to architecture.

A gargantuan crystal kingdom.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

One man's fulfilled dream of living on an artificial island made of recycled plastic bottles.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

These azure waters were thought to lead to the Mayan Underworld.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

Little island known for its massive beachfront "flowerpot" pillars.