A massive Montreal stadium that has seen nothing but trouble since its inception.

The biggest museum dedicated to insects in North America, one of the largest in the world.

This mesmerizing kinetic sculpture blossoms endlessly in the breeze.

This hidden park hosts a rogue’s gallery of eccentric architectural obelisks.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The system of air guns are fired off remotely to scare any trespassing avians.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

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

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

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

There’s a hidden military meme engraved on the World War II Memorial.

The "Key of Keys" for Washington, D.C. and the apocryphal landing place for the military campaign that started George Washington's career is now at the bottom of a well.

The only tennis court that falls under the jurisdiction of the central bank.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

After James Madison's death, his wife and former First Lady Dolley Madison lived in this yellow building near the White House.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A small park honors the legendary Ukrainian poet.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

A historic ruin just 20 feet away from a busy highway onramp.

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