Historic Lee family homestead built in 1785, later serving as a private home and a Civil War hospital.

The narrowest house in America is seven feet of pure spite.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

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

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

An abandoned textile mill that is now home to art and concerts.

Anna Anderson spent most of her life claiming to be the lost Romanov child Anastasia.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Outsider art meets paleontology at this roadside reptile repository.

Little has changed in the way that this mill operates since the 18th-century.

Every autumn, this grove of living fossils erupts in a blaze of brilliant golden-yellow leaves and stinky fruit.

Crumbled shell of one of the oldest buildings in Virginia.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

A natural spring situated on the grounds of the Hawthorne estate.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

On the site of a former Army ammunition plant, bison now roam a restored sea of grass.

The buildings around this DePaul University statue create an echo chamber for those standing in the center of the circle.

A forsaken wonder in the middle of the East Side neighborhood.

This restored house is like a time capsule of the president's unconventional inauguration.