What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

Wisconsin's most celebrated export gets the royal treatment on I-94.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The nation's second-ever First Lady urged the founding fathers to "remember the ladies."

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The homestead of American patriot John Adams.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A beautiful Victorian-era cemetery, complete with a miniature village.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The final resting place of the great navigator, or maybe his brother.

The modern birthplace of Irish freedom.