Nikola Tesla's former home contains an homage hidden from plain sight.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The "Seinfeld" diner.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

A crumbling hospital from the 1850s on Roosevelt Island.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

Hidden within a spa in a Texas strip mall is a restaurant specializing in Eastern European foods.

The world's second-longest burning light bulb.

This small museum tells the story of Fort Worth's first and largest superstore.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Remembering the Alamo with a full-scale replica of the 1836 city.

The oldest functional consecrated church on Mustang Island.

Home to a full-scale replica of the Ezekiel Airship, an aircraft that allegedly flew in 1902—a year before the Wright brothers took to the skies over Kitty Hawk.

This eight-mile stretch of road gets its name from a local legend about a lost soul searching for his head.

The biggest drug trafficking passage between Mexico and the U.S.

Roadside Americana, fairy tale characters, and Austin quirkiness come together at this magical course in the heart of Texas' capital city.

This family cemetery is a reminder of a smallpox outbreak in late-19th-century Texas.

This abandoned building made of petrified wood was once a hotspot for buying moonshine.