This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

This kiln was erected to produce charcoal for gas producer units during World War II.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

This pagoda was once the central feature of a Buddhist temple that no longer exists.

This sandstone tree trunk is a relic from a long-past era when England had a more tropical climate.

This river island in Sierra Leone is home to impressive biodiversity and the country's first community conservation program.

Explore the wide world of desert plants at this unique Palm Springs botanical garden.

A giant bird sits atop a tower at one of the largest shopping centers in Brazil.

Sculpture garden and miniature golf course blend together in the oversized backyard of a Minnesota sculptor.

This metal shop's yard is filled with cutout art including an Eiffel Tower replica and Noah's Arch.

This open-air, narrow-gauge railway museum pays homage to the region's transportation history.

This abstract sculpture was initially so disliked that it got moved to the outskirts of town a few months after installation.

This enormous sinkhole hides a secret world created from divine wrath.

Walk in the footsteps of the famed astronaut at Purdue University.

For decades, the parade of apostles that left the Expiatory Temple of Guadalajara remained hidden inside one of the towers.

This brothel-turned-restaurant features plenty of surprises and elaborate, extravagant architecture.

This small hermitage on Mount Scalambra was built near what some believe is the miraculous imprint of Saint Benedict's hand.

An abandoned skate park located in the middle of the wilderness.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.