The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Home of the "true" equator.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

Visitors come from all over to bring gifts and tokens to the grave of Alice, who is thought to have died of a broken heart.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The romance of early commercial flight still fills this Art Deco destination.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

A local prank turned town icon.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

This historic mansion was built as a symbol of love between a husband and wife.