L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

Elvis's own personal tropical hideaway.

A second generation sun-powered marvel lights up the night.

A treasure hunter's tiny bar, harboring celebrities since 1959.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

An offbeat angle on the ocean viewed through an antiquated lens.

Under Hanoi’s medieval citadel sits a secret military headquarters from the final years of the Vietnam War.

Pay your respects to a folk-punk legend.

An otherworldly musical haven in The Big Easy.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Macabre astrological automaton clock dating to the late 1400s.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Historic funicular railway, believed to be the shortest railroad in the world.

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