The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

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

Rippling sand dunes frozen in the Arizona rock.

The unusual patterns in this rock formation result from two distinct modes of weathering.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

This balancing rock is one of Utah's most unusual geological formations.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

A scrap-metal sculpture recalls an infamous 19th-century camel.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

A New Hampshire grave with a grudge.

The largest collection of historic military firearms in the United States.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

It's not a typo, now say it five times fast!

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.