The only structure left with direct ties to the Salem witchcraft trials of 1692.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

16,500-acre ranch filled with American heritage, geological wonders, and a giant pile of tires is the crown jewel of an intriguing tug-of-war.

The national park was once a plantation estate.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This supermarket is suspended 25 feet above an interstate highway.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The colony of South Australia was proclaimed on a hot December day under a distinctively arched gum tree.

The only sea in the world that has no land boundary.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The first declared National Monument in the United States.

An architect's childhood fantasy treehouse made real.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."