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

A reproduction of earth's many biomes.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

These unusual houses look like giant boats that washed ashore on a residential street.

A Biblically-based Natural History Museum.

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

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

The striking jade death mask of an ancient Maya king is displayed in a replica tomb in Mexico City.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

This black shoreline is made up of exploded lava particles.

Watch the newest land on the planet form before your eyes.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

An extensive collection of ancient Egyptian artifacts and mummies.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

This turn of the century masterpiece has a mysterious goaty interloper.