The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

The towering figures were created from the cemetery's fallen old-growth trees.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

This historic lighthouse was well known for the large number of women who served as its keeper.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

A haunting tribute to pioneering photographer Clover Adams.

There's a crumbling old mansion inside the Smithsonian National Zoo.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The national park was once a plantation estate.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A historic neighborhood church is reborn as a psychedelic arts collective.