This spot in St. Louis, marked with a simple sign, has seen more pro baseball than just about anywhere else in the world.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

A chessmaster's dream destination.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

This is not your typical jungle gym.

An urban forest overtakes what was the greatest failure of utopic urban housing.

An overlooked memorial honoring the local Washington residents who died in World War I.

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

Decades before the scandal, this staircase on the river was a literal "water gate."

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Fittingly, America's museum of architecture is itself a magnificently designed old building.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A historic neighborhood church is reborn as a psychedelic arts collective.

Washington's iconic carousel has a nice piece of Civil Rights history.

A historic arena where the Beatles played their first concert in the U.S.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

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

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

A relic of FDR's brief foray into utopian urban planning.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.