Curious cave that stays a cool 56 degrees all year long.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

A legendary music collector donated his entire collection to the entire city of Memphis.

A Memphis park where you can walk the whole Mississippi River in one go.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Home to drunken tower-climbing goats... seriously.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A remarkably opulent mansion with a tragic history.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Charles Babbage's proto-computer, painstakingly brought to life.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

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

A fantastic castle rumored to be the birthplace of King Arthur.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

This 19th-century performer's gravestone identifies her as "the smallest woman ever in this Kingdom."

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

Improbably, the largest wildlife refuge in the conterminous 48 states sits just northwest of Las Vegas, Nevada.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.