A winding path built in secret on the edge of the continent.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

America's most famous piece of self-built architecture.

A walk through the historic city center, under the streets of Seattle.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

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

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

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

A bizarre house filled with an astounding array of collections.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

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

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Dramatic river bend surrounds a natural red-rocked pedestal.

An emerald-green grotto just a short trip from Austin.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A 140-year-old castle with underground caves hidden in San Francisco.

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

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.

World's first "penitentiary," meant to be humane, drove men insane.