Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

This eye-catching sculpture of rural life seems a bit out of place at a suburban intersection in front of a car dealership.

This local mascot has been a presence in the area since the 1960s.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

This groundbreaking 16th-century map is known as "America's birth certificate."

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

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.

The narrowest house in America is seven feet of pure spite.

This large garden vase urn has nothing to do with the seventh U.S. President—it was designed by one landscape designer to honor another landscape designer's contributions to the National Mall.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

The Giant Lemon of Lemon Grove.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."