A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

Mysterious installations bring levity and light to a sometimes stodgy city.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

An acoustic anomaly with a mysterious cause.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

A peculiar forest that was handcrafted for government experiments.

Named for the 39 tribes that live in Oklahoma, this restaurant's menu deliciously highlights local flavors.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Abandoned power station once home to a squatter community, now being developed into an arts center.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

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

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

At 207 feet, one of the world's longest continuous escalators.

The site of the climactic scene from the classic horror film is now a historic landmark.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.