Manatees congregate around a power plant's discharge canal where the water is especially warm.

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

Fascinating military history, awe-inspiring wildlife encounters, and endless outdoor adventures draw people to this sprawling park.

The hall of fame for circus performers.

This Florida resort community is where the Amish come to have fun in the sun.

One of the oldest, tallest, and most haunted lighthouses in America.

The only Florida state park with publicly accessible caves.

An unusual college football tradition involves burying pieces of sod from competitors' turf, replete with tiny coffins and headstones.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Rebuilt remains of a temple to Roman god Mithras.

This 1920s Dutch barge is now a floating bookstore.

This coffee shop lies hidden beneath a historic church.

The only museum with its curator—and her pets—buried inside.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This once-derelict building is now one of the most beautiful bookstores in the world.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.