Concrete igloos standing across from what remains of the Michigan Central train depot.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

These unusual houses look like giant boats that washed ashore on a residential street.

Off the Florida coast, a whimsical world of marine sculptures are revitalizing coral reefs.

Built in 1927, this pink stucco hotel once hosted stars of Hollywood’s silent movie era. Now it's being brought back to life.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

One of the oldest lighthouses in the world has been in continuous use since it was first built in 1531.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

Europe's largest community of crocodiles and alligators.

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

This former hunting grounds that once attracted U.S. presidents and other luminaries. Now it’s a privately owned research reserve dedicated to environmental sciences.

This giant statue pays homage to this temple's furry residents who keep the landscape pristine.

These unconventional "tub boats" let locals row around the island's turbulent coast.

A unique botanical garden housed in three giant geodesic domes.

This supermarket offers shoppers a window into the past alongside their groceries.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

This award-winning men's bathroom was just too beautiful to not allow women to see.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.