A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

America's first federal monument.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Right next to departures—how convenient!

The romance of early commercial flight still fills this Art Deco destination.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

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

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Decades before the scandal, this staircase on the river was a literal "water gate."

The national park was once a plantation estate.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

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

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

This unique historical monument features large concrete spheres designed to resemble fallen stars.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

This former Cold War missile control site played an important role in the creation of GPS.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

A genuine Tudor manor transported piece by piece from England.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.