Illegal drag racing two stories beneath Chicago’s streets.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Home to a protest movement, a bombing, and a dramatic change in labor history.

A lush green oasis in the middle of Chicago.

The face of a woman pushes its way through the earth.

An easy to overlook storefront hides some of the most authentic and regionally diverse Chinese food in New York.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Ride the subways of yesteryear.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Three prestigious academic collections come together to create a world-class natural history museum.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Elevated freight railway turned wildly successful urban park.

130 replicas of world wonders squeezed into just 118 acres of space.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.

These mansions date back to Chicago's days as a brewer's paradise.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

Venture into the hideout of one of Hong Kong's legendary pirates.