A heavenly experience, right here on Terra Firma.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A strange house built only at night, with rumored mystic inspiration.

Ride the subways of yesteryear.

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

This frequently-photographed waterfall takes only a short hike to visit.

A speakeasy takes on Chicago's drinking culture.

Read a book next to a Midtown waterfall.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

A library of rare occult books in Los Angeles.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

Where beautiful signs live on forever.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Olfactory delights in San Francisco's Botanical Gardens.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A hip bar decorated with walls of golden skulls.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A rare view of a preserved Victorian science museum.

Two thousand artifacts from around the world collected by one woman who loved to travel.