Surrounded by a verdant garden and a backdrop of ivy, a monument to beloved poet Khalil Gibran stands outside of the Lebanese embassy.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

The first museum in the U.S. to address human rights issues in China.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Millions of numbers carved in glass represent the tattoos forced upon victims.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

This steamer is known as "The ship that built Cleveland."

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

The first artificial white water river course in North America cuts right through an Indiana city.

The empty tomb that houses the memories of Roy Bertelli's revenge.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

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

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

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

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

Illegal drag racing two stories beneath Chicago’s streets.

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

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.