An acoustic anomaly with a mysterious cause.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

This statue intended for children to enjoy became a minor political spat.

Stolen goods adorn the organ at Old North Church.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

Ice cream stand, snack bar, and time capsule of milk conveyance.

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

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

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

Largest Roman Catholic church in North America.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

The curiosities and wonders of pharmacy in a delightful historic building.