The grand marquee of this abandoned Hawaiian theater remembers the building's elegant past.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

Years of neglect and nature took a toll on this 19th-century lighthouse.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A hands-on traveling collection of the innovative devices of yesteryear.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A world of craftwork elegantly curated in a historic brick warehouse.

This café is dedicated to serving coffee roasted by Native American-owned companies.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

Gigantic private toy museum featuring among finest collections of antique mechanical banks in existence.

Portlandia is the second-largest copper repoussé statue in the United States.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

One of the indelible moments of the American Revolution took place at this location.

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.

These whimsical works of art tell the story of the city's past and present.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.