Two thousand feline artifacts fill Malaysia's "Cat City."

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

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

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.

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

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