An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

A public art jibe at one of the United States’ oldest and longest-serving senators.

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

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