A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

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

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

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

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

Continuing the tradition of the dime museum in style.

An emerald-green grotto just a short trip from Austin.

Where animatronic singing fish go to retire.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Cannon designed to fire an atomic warhead.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

This quirky Arkansas wax museum does not shy away from the macabre and the grotesque.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.