The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

The legendary building that needed ghostly approval before being built.

Resting place of Hollywood's immortals is also site of summer film screenings.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

This failed condo development was reborn as a street art hub.

Austin’s local mountain isn’t really a mountain at all.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A free, canine-friendly alternative watering hole near the more famous Barton Springs.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

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

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

A modernist landscape of water and sci-fi concrete.

Believed to be haunted, this old cemetery is beautifully adorned with Spanish moss hanging from the trees.

A Circus legend leaves an unexpected endowment.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

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

An island graveyard with spectacular views of the Caribbean.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.