Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The remains of a historic ranch house that witnessed the Civil War battle dubbed the “Gettysburg of the West.”

Commemorating the spot where the famous scientist fed his pigeons.

A park where people have been going to feed friendly pigeons since the 18th century

This statue honors the thousands of Allied avians that served and died for France during World War I.

A harbor town pays tribute to a heroic wartime carrier pigeon.

These little castles each held thousands of pigeons.

A historic structure that once housed pigeons used by farmers to help fertilize farmland.

Birds with backpacks expedite film development for a rafting company on a remote Colorado river.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

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

The world's oldest soul food restaurant is also one of its best.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

A derelict bit of transportation infrastructure hidden in the woods.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.