A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Volo Bog is the only open-water quaking bog in Illinois, and also the southernmost open-water quaking bog in North America to exhibit all stages of bog succession.

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

The most decorated dog of World War I is preserved in the Smithsonian.

Perhaps the most scandalous statue of America's first president.

This taxidermy horse was a Civil War hero.

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

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

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

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

The "lovely red Vega" of the legendary record-settling pilot.

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

Across from a hotel parking lot, a Confederate spy rests under a large tombstone with her Union Veteran husband behind a copse of trees in a small, well-maintained cemetery.

Louis Sullivan’s dark, swirling cast-iron designs envelop a popular department store in this Chicago landmark.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

A lone traffic cone perched on a ledge has remained unmoved since at least 2011, unofficially earning the status of a tiny Chicago landmark.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

Hundreds of protractors affixed to surfaces all over the city.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.