The two writers famously didn't come to blows over the Oxford comma.

Over 50 whirling pools left behind from the glacial age.

Friction between grains of sand cause a curious "singing" sound.

Museum dedicated to awful artwork.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Make a wish at what might be America's only Catholic shrine to a sinner.

One of the largest private collections of cars manufactured by the short-lived Franklin Automobile Company.

An off-the-beaten path cave with an underground lake.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

A cabinet of curious mathematical models and old calculators.

For those going through a life transition, a place to leave behind a piece of your former self.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

Legend says train robbers stashed their gold within the depths of this unusual cave.

The eroded core of an ancient volcano is now accessible by a short hike.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A Tucson museum and performance space full of found-object movable sculptures.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.