The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

This replica of a 16th-century French settlement memorializes one of the earliest attempts at a European settlement in North America.

Discover diverse aquatic life and befriend resident turtles at this private diving grotto in north Florida.

Every winter, this tiny islet on Florida’s Gulf Coast is swarmed by some of the largest birds on the continent.

A plaque honors Miami's sister city in the Canary Islands, inviting one to reflect on their place in the world.

Known as the most resilient water tower in the region.

After a long career, a disastrous sinking, and a half-successful salvage, this Naval vessel-turned-artificial reef ended up exactly where she was supposed to—with a little help from nature.

Six miles off the coast of Key West, a former military transport ship is now one of the largest artificial reefs in the world.

These craggy limestone outcrops offer a glimpse at a unique piece of Florida geology.

This Buddhist temple is home to a number of towering statues spread over a peaceful wooded park.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

Though nicknamed the “Russian Freighter,” this ship was actually sunk off the coast of Pensacola by the U.S. government in a top-secret operation.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

A lone gunner's station is all that remains of a replica Spanish Fort in Florida.

This small island was the first National Wildlife Refuge ever created in the United States.

These mysterious ruins are hidden amid this sleepy coastal city.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

A unique collection of diving equipment spanning antiquity to the present day.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

A sprawling maze of used books piled from floor to ceiling.

This lush Florida island is home to the ruins of a crooked ship breaker's tiny empire.

"We Seceded Where Others Failed."

This state park was once an important Native American cermonial center.

One of the largest Native American shell middens stands 30 feet tall.