A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

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

The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A former factory serves as a shrine to the industry that sustained Santorini for decades.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

An 18th-century townhouse that once hosted guests of the president.

An overlooked tribute to one of the most important peace deals in American history.

A memorial to a shareholder activist feared by CEOs around the United States.

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

Garments from across the globe call this hidden gem home.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Inside this curiosity shop, visitors can peruse the clown collection or purchase a molar from the mouth of Bigfoot.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

Ancient Bronze Age rampart that was used into the middle ages.

This Neolithic passage tomb forms part of a World Heritage Site.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Some of the saint's blood and bones are said to reside in Dublin.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.