A memorial dedicated to the victims of the Columbine High School shootings.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

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

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

This statue of the "father of television" stands prominently in the United States Capitol.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Exact replica of the ancient monument, but much, much lighter.

The last vestige of a once substantial orchard and farm in the suburbs of Northern Virginia.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

Home of modern dancer famously strangled by her own scarf.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

The longest continuously operating Elk's Lodge in the country.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

A shining, cold, black organ lies in San Francisco's financial district.

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.