This haunting monument honors the victims of 9/11.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

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

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

Discover diverse aquatic life and befriend resident turtles at this private diving grotto in north Florida.

This stretch of highway is said to be haunted by ghosts of settlers whose graves were paved over.

A building so large that it has its own weather.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A well-preserved example of an early industrial operation in the northeastern United States.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Vermont's hills are alive with the sound of music at this historic hotel.

A giant toy jack made of numerous welded-together fire hydrants.

The highest peak in the state of Vermont has some interesting features.

Near the summit of Mount Washington, a stone monument remembers a life lost to one of the mountain's infamous storms.

This cabin survived a landslide that killed its owners.

One of the two USPS mailboats left in service docks regularly at Weirs Beach, Bear Island, and other Lake Winnipesaukee islands to deliver their mail.

The early 20th-century home features cutting-edge technology of the day, such as ammonia refrigeration and needle showers.

A real-life hidden Easter Egg in New Hampshire's capital city

A serene plaza that commemorates one of the Granite State's most iconic figures.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.