A ruined hotel with an unlucky history and an eerie present.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Stay in a room with a view... of the bottom of the ocean.

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

A giant 400-acre preserve in North Florida for displaced wolves.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Most famous work of one of Frank Lloyd Wright's sons.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

America's only nuclear missile silo open to the public.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

One of the ghostly stops along Route 66.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The longest living non-clonal organisms on Earth.

Ride the subways of yesteryear.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Dig for your own trilobites in this goldmine of invertebrates.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

Small museum packed with artifacts recovered by the man rumored to be the real-life inspiration for Indiana Jones.

A haunted hill that supposedly defied gravity.