Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

Famously misunderstood wonder of the ancient world

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

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

Home to items never before seen by the public.

The maritime museum that boasts the largest nautical library in the western hemisphere.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Lie in a hammock where George Washington stood.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Elevated freight railway turned wildly successful urban park.

Tucked in the back of this amazing antique store is an important piece of medical history.

There must be a pun in this haystack somewhere...

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

The site of a tragic massacre that spawned a multimedia franchise.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

An eccentric playboy's astounding natural history collection.