Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

The first declared National Monument in the United States.

Native Americans built this circle of stones, which was used to predict astronomical events.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

A legendary speakeasy bookstore returns from the brink.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

An unassuming secret door once led to a legendary watering hole.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A Natural History and Science Emporium.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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