The oldest military monument in the United States.

World War II bunker still standing on the New Jersey beach.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

The grave of a champion Thoroughbred hides within the former presidential estate.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

One of the last active volcanoes on the Eastern seaboard.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

This old-fashioned carhop restaurant gave the world the waffle cone.

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

Exact replica of the ancient monument, but much, much lighter.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

This maze-like slot canyon is a unique gem within an already fascinating geological area.