A hand-built folk art installation covered with messages of God's love.

The first declared National Monument in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Stroll through a wonderland of stupendous moss-covered trees.

A one-of-a-kind collection of a unique medium.

Resting place of Hollywood's immortals is also site of summer film screenings.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

An enormous, inside-out glass globe built in 1935.

Dramatic river bend surrounds a natural red-rocked pedestal.

A snapshot of the city's fascinating voodoo culture.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Most-visited and most-photographed slot canyon in the American Southwest.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A psychedelic labyrinth on the San Francisco bay.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.