Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

A bit of retro transportation flair preserved in the world's largest department store.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

New York City's smallest piece of private property.

The massive machine creates cracking displays of indoor lightning.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

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

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

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

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The romance of early commercial flight still fills this Art Deco destination.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.