This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

A 1940's shrine dedicated to drowned fishermen on the outskirts of Honolulu.

A unique set of caves that spits waves back out into the ocean.

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

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

This clock tower is all that remains of Bird Hall, constructed by one of the founding families of this Massachusetts town.

The grave of William Rosenberg, founder of Dunkin Donuts (now Dunkin') with shops coast to coast in the US and 42 countries worldwide.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

She become one of the first women to serve in the United States military by secretly dressing like a man.

A sign marks the location of an 18th-century sawmill allegedly owned by a wizard who employed Satanic imps.

This WWII plane died a quiet death, and is now a garden eel playground.

Watch the newest land on the planet form before your eyes.

The largest living museum in the Northeast recreates life from the Early Republic period complete with costumed historians and reenactors.

This museum shines a light on the true Pilgrim experience in North America.

This beautiful Cape Cod beach offers dazzling views and an interesting historical footnote.

The gravestone of the man who designed the plastic pink flamingo is adorned with his most famous creation.

The mansion home of author Edith Wharton.

Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

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

This candy-colored storybook village originated as a 19th-century Methodist campground.