The United States Capitol's former columns still stand.

An astounding collection of medical specimens, including bits of President Lincoln.

Largest Roman Catholic church in North America.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

An original apothecary from 1792.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

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.