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

Where commuters walk through remnants of an ancient Greek necropolis.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A self-built castle made by a mysterious man.

The unusual burial monument of Arizona's first governor.

A geological mystery on Camelback Mountain.

This small, unassuming street is now a canvas for color and creativity.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A former department store turned into a quirky restaurant.