Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

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

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

A secret greenspace hides atop a Capitol parking garage.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

Concerned residents saved this historic house and garden from demolition.

An astounding collection of medical specimens, including bits of President Lincoln.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

A historic arena where the Beatles played their first concert in the U.S.

Where you can hail your favorite fictional commanders-in-chief.

A nostalgic bibliographic gem.

This groundbreaking 16th-century map is known as "America's birth certificate."

The National Park Service’s best-kept secret with views that rival any in D.C.

A memorial to a shareholder activist feared by CEOs around the United States.

A haunting tribute to pioneering photographer Clover Adams.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

A controversial magical figure is hidden within a diorama of the city.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Here be dragons.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.