The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

A memorial marks the library lobby where Langston Hughes' ashes are buried.

Set sail on a small scale.

Ever wanted the laymen's version of your credit card fine print?

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Come for the waffles, stay for more waffles.

The notorious headquarters of a corrupt political machine.

New York's oldest magic store.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

A super-sized promotional trick that is now a D.C. landmark.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

A clone of a cloned tree that was so important it allegedly had its own guards.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The district's only illusionarium supports free writing programs for local students with every purchase.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

It was once the base for a series of domestic terror attacks.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.