Artist James Turrell's ode to dawn and dusk on the campus of Rice University.

A mysteriously abandoned campsite in San Angelo State Park.

The only diamond mine in the world where you can keep what you find.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

The only international border marker within the United States.

The 19th-century ruins hide deep in an overgrown forest.

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

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

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

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

A medieval castle in the middle of rural Texas.

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.

Twenty churches beautifully painted by 19th-century Czech and German immigrants in Texas.

This unique tower has been home to malaria-fighting bats for 100 years.

No one is sure why this mysterious tradition started.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

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

This one-woman cemetery was a small civil rights victory.

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

Continuing the tradition of the dime museum in style.

DIY collection of eclectic holdings.