The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

The first of Lancaster's "rural cemeteries."

This forgotten boat elevator was an engineering marvel in its heyday.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Walk through the history of American pop culture.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

This historic lighthouse was well known for the large number of women who served as its keeper.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

The graffitied ruins stand hidden within the Pennsylvania woods.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A diorama of the Civil War, fought by cats.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

An outlandish shoe shaped house built by an eccentric millionaire.

A secret greenspace hides atop a Capitol parking garage.

The only tennis court that falls under the jurisdiction of the central bank.

The national park was once a plantation estate.

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

An eerie, decaying ghost town destined to fade into the forest.