This ''hidden'' 19th-century bridge played a simple, yet important role during the Spanish-American War.

This giant bronze image of Christopher Columbus embarked on a voyage of its own.

This small fort played a huge role defending Puerto Rico’s capital city.

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

This tiny home was originally a narrow alleyway.

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

This former sugarcane transport tunnel is now a portal to a lovely beach.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

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

The world's brightest bioluminescent bay.

"The Wonder From Down Under," a worm shaped museum celebrating the endangered Giant Gippsland earthworm.

Just one of many oranges on this citrus-happy continent.

The last timber and iron Chinese temple in Australia.

The decommissioned submarine is now the symbol of a small, inland Australian town.

One of the world's largest tractors was built to replace camel caravans.

This simple sailing boat is one of the oldest preserved fishing vessels of its kind in the world.

Inspired by the local football team, this giant ant is meant to draw tourists to a tiny Australian town.

Queensland's largest dam includes a winding spillway that offers drivers a mesmerizing sight.

A unique memorial to the bunnies who died because of Australia's historic Rabbit Proof Fence.

Giant lamp houses the tourism information center.

There's a lot of horsing around on this lonely stretch of Australian highway.

Bomb tests and sheep ranchers share the world's largest military land base.

The Gunditjmara Aboriginal people of Australia began construction on this vast aquacultural complex 6,600 years ago.