One of the oldest of its kind.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The first declared National Monument in the United States.

One of the largest private collections of fossils in the world.

Over 50 whirling pools left behind from the glacial age.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

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

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

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

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 Annapolis home was built by one of the signers of the Declaration of Independence.

This statue honors the author's groundbreaking family story.

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

An abandoned church gets a second life as a massive beer hall and event space.

The land is home to swimming ponies and a legendary 18th-century treasure.

The story behind this beloved toy—named for Theodore Roosevelt and owned by his grandson—is more complicated than you might guess.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.