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

A haunting tribute to pioneering photographer Clover Adams.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The span is crooked and made from two older recycled bridges.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

The U.S. government built the million-pound stack of steel during the Space Race.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

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

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