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

The National Park Service’s best-kept secret with views that rival any in D.C.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

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

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.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

"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!”

A 100-foot metal tower and swinging bridge that provides stunning views of mountains in five states.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A monument to one of the few Olympic flames ever to be lit outside of the host city.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

Local myth claims this is a Sears catalogue home with its windows installed upside-down.

The oldest liquor store in the country is a model of resilience and mischief.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

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

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.