This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

This poor little statue is the most vandalized memorial in Washington.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

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

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