This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

One car at a time please.

A small chapel celebrating the spiritual bond between dogs and humans.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

The whole of Maine's history with the salty little fish is packed into this tiny coastal museum.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

A son's promise to his dying father in the form of a covered bridge filled with thousands of seashells.

This candy-striped tower is the farthest east you can go in the United States.

Trinkets and toys lovingly handmade by maximum security prisoners.

The largest tidal whirlpool in the Western Hemisphere.

Sculptures, jams, and the wild west collide at this folksy retreat.

Toy museum in a former tavern is the expression of one man's life pursuit of the aesthetic power of cartoon imagery.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

An homage to the pointers and retrievers that have long been a hunter's best friend.

Dinosaurs invade a suburban Nashville neighborhood.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Elvis's own personal tropical hideaway.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

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

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

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

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

Visit this playground of waterfalls, caves and sinkholes.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.