A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

There’s a special club house at the top for the bell ringers.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

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

Washington's iconic carousel has a nice piece of Civil Rights history.

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

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The house where John Wilkes Booth conspired with his co-conspirators.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

This monument commemorates the only American soldiers to have directly fought Russians during World War I.

Located in a Civil War era building, this café is engrained with the spirit of Edgar Allen Poe.

What was once the largest NFL stadium.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

On the shores of Lake Kalamazoo, a plaque marks a fictional event where an island nation ran aground.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

The "Seinfeld" diner.

This kitschy tavern is also home to rare early editions of "Treasure Island."

The only place for a truly presidential dram.

Enjoy dishes that founding fathers once ate at this Colonial Williamsburg pub.

Perched atop a brick smokestack, this enormous lug nut symbolizes the local minor league baseball team.

In this quiet park a rendition of a classic painting graces the outside of a charming restroom.