Stand at the center of this lakefront sundial, and you'll become part of the timepiece.

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

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

This charming woodland trail is peppered with poetry.

An ancient glacial pothole waterfall in the heart of the Green Mountains.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

This lovely pocket park is one of the most under appreciated in D.C.

Now a living classroom, this house was once the home of Reverend James Clinton Dent, a formerly enslaved man and a pastor.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Home to items never before seen by the public.

A historic neighborhood church is reborn as a psychedelic arts collective.

The oldest continuously operating fish market in the United States.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The site of the climactic scene from the classic horror film is now a historic landmark.

There's a crumbling old mansion inside the Smithsonian National Zoo.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

A celebrity from the late Cretaceous period.

The most accurate timepiece in the world.

The span is crooked and made from two older recycled bridges.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

The historic home of an educator, abolitionist, activist, and poet.