A collection of abandoned typographic signs from Berlin and beyond.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Yup, that's a 330-foot yacht passing over the highway.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

Two monstrous faces loom over a village in Czechia.

This storybook New England home is actually a decommissioned lighthouse.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

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

This lovely pocket park is one of the most under appreciated in D.C.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

An Industrial Revolution-era public work that purified water using nothing but sand.

A super-sized promotional trick that is now a D.C. landmark.

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

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

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.