The final resting place of the poets Shelley and Keats.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

What is the Thing?

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Crumbling hotel echoes with the sounds of the '30s.

Three hundred years of preserved Spanish colonial history in San Antonio.

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

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Behind the Cowboy Hall of Fame is a burial ground for good horses and a famed rodeo bull.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

Built from oil field parts and resembling a teepee, this abandoned mid-century church is hoping for a comeback.

Turning night into day in Victorian-era Austin to thwart a serial killer.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

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

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

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