Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

The summer home of the largest colony of bats in the world.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

A master plumber has turned his love of art and toilets into a folk museum that's not taking the piss.

A former electrical substation is now home to an eccentric junk art masterpiece.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Mysterious glowing orbs float through the desert night.

DIY collection of eclectic holdings.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

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

One part antique store, one part curiosities hodge-podge.

Continuing the tradition of the dime museum in style.

A popular swimming hole that hides one of America's most deadly diving spots.

A health museum containing a 27’’½-foot intestine.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

A museum within a museum, devoted to history's most questionable medical devices.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.