San Francisco's newly reopened hands-on science museum.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Golden Gate Park's historic collection of plants.

Olfactory delights in San Francisco's Botanical Gardens.

San Francisco's first World's Fair, dedicated to the wonders of California.

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

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

A health museum containing a 27’’½-foot intestine.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

A mythical chimera first sculpted in 1936 as a mix of the main animals of Texas livestock.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

This downtown Dallas art installation is always on the lookout.

A modernist landscape of water and sci-fi concrete.

A Texas museum filled with Broncos and Betties.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

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

Locals dubbed it the "Owl Building" because of its bird-like appearance.

A grove of colossal man-made flowers built to collect the sun's rays.

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

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

The 40-foot-tall votive candle is the largest of its kind.