A reproduction of earth's many biomes.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

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

A colorful public mural in San Antonio's West Side encourages students to stay in school.

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

A mother's mourning for her lost son is remembered in this small park embedded with his memory.

Tile mosaics and quotes from Pablo Picasso add an artistic flair to these bus stop benches.

This big empty pig is a nostalgic throwback to mid-20th-century Texas barbecue.

The quirky gift from West Berlin for the 1968 World's Fair still stands in Hemisfair Park.

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

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

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

Nestled in the heart of a Texas town is a dreamy secret garden dating back to the 1940s.

This 45-story tall abandoned skyscraper is the third tallest building in New Orleans and Lousiana.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

This strange example of the Egyptian Revival architecture trend now holds Mardi Gras floats.

This unique shop is full of memento mori art, antique medical equipment, secret society paraphernalia, and historical relics.

A house of courtship where the Jazz Age's most storied lovers got their start.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

This Garden District mansion was built to be bigger and grander than its original owner's former partner turned rival.

A little piece of Paris in the sultry south of the U.S.