This replica of the Greek structure is in the heart of Nashville.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Oldest synagogue in the United States.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The oldest still-operating tavern in the United States was once owned by a pirate.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

Mural fragments and various sculptures honor the longtime artist.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

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

The oldest philatelic museum in the United States.

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

The headquarters in Salem doubles as an occult art gallery.

Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

Hundreds of personalized inscribed planks make up this historic boardwalk.

One of the last remaining movie theatres in the country that features a rear-projection system.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

Memorial to a beloved puppeteer as well as all street performers.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Historic Hull Street was actually the first street with a proper name in the Boston area.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

An eccentric inventor's castle home with its own indoor weather system.