A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

The eccentric mansion of one of the most popular horror authors of modern times.

A very classy 1920s-era bar right in Grand Central Station.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

This maze-like slot canyon is a unique gem within an already fascinating geological area.

An antiquated German apothecary on Chicago's North Side.

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

The intriguing personal collection of a professional demon-chaser.

Rare recess caves fill this unbelievably beautiful Ohio park.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The longest navigable underground river in the United States is home to countless blind and albino animals.

European castle ruins in an American state park are actually the product of death and grief.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An abandoned relic of the city's failed experiment with below ground transit.

Less a museum than a bizarre fantasy world created by artists and engineers.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.