Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

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

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

An unusual bed & breakfast made of papercrete.

Minimalist modern art on a repurposed military base in rural Texas.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

One man's homage to the orange as realized through a long-term folk art labor of love.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

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

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

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

Mysterious glowing orbs float through the desert night.

The Grand Canyon of Texas.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

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

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

An isolated dive site teeming with cnidarians.

This Costa Rican topiary park is a surreal garden of unearthly delights.

The palatial McDonald's that inspired Wesley Willis.

In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

A European-style bath house in Chicago.

A Museum of Holography frozen in 1974.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.