Elvis's own personal tropical hideaway.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

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

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

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

Thousands of signed dollar bills turn a simple tavern into a living record of travelers’ comings and goings.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

This historic oak tree has been around for over 300 years and might last for 300 more so long as it doesn't fall apart first.

Now abandoned, the first reinforced concrete bridge in Alabama still stands over the Pea River.

This tiny, triangular block has held the world record since 1964.

The only Florida state park with publicly accessible caves.

This historic hotel has hosted the likes of Babe Ruth, Jimmy Carter, and the Vanderbilts.

Every January 6, young men dive into Spring Bayou in search of a cross and a year's worth of maritime blessings.

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.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Ruins of an old sugar mill sitting quietly next to a park in rural Florida.

Meet manatees face-to-face at this zoo for native species.

This natural spring is the winter home to the largest gathering of manatees in the world.

The mounds on this coastal archaeological site reveal the history of the land’s first inhabitants.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.

A thriving Black community was destroyed by an angry white mob at this site in 1923.