Elvis's own personal tropical hideaway.

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

Walk the whole Mississippi River!

This replica of the Greek structure is in the heart of Nashville.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

The watery grave of an impractical idea.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The famed architect designed this Minnesota gas station of the future with a lookout tower.

"The Most Boring Road in the State."

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

World's largest Christmas store.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.