An extravagant western hotel where every floor is the "ground floor."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

The system of air guns are fired off remotely to scare any trespassing avians.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

The rogue roots are gradually consuming some of the historic marble grave markers.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

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

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

Step inside Lucy, the world's largest "elephant."

The historic home still shows the scars from a little run-in with the British in 1813.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

The collection of 80+ pieces created between the years 1100 and 1500 is intended to be seen, heard, smelled, touched, and tasted.

A creative deviation in this post office's design was once a source of controversy.