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

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

One of only two commuter aerial tramways in the United States.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The site of the deadly Triangle Shirtwaist Factory Fire.

A hidden oasis just north of Chicago's Chinatown.

Chicago’s last original drive-in restaurant is a family-run hot dog joint that started in 1948.

Also known as the Osaka Garden, this garden was originally built in 1893 as part of the World's Columbian Exposition.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Red frames showcase remnants of one of New York's original subway stations.

Ride the subways of yesteryear.

There must be a pun in this haystack somewhere...

Commemorating the spot where the famous scientist fed his pigeons.

The "Seinfeld" diner.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

These abandoned grain silos and tunnels are an urban exploration dream.

This shop for all your super spy needs hides an educational secret.

A small graveyard is hidden in the midst of a bustling university campus.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

The multinational Burger King chain is banned from operating within 20 miles of a family restaurant filed under the same name.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.