This natural marble cave is one of only five national monuments in Oregon.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A swamp and garden tour featuring local wildlife and exotic botanical specimens from around the world.

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

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.

Hill-like structures formed by glaciers and sandy spits of land.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

The world's largest piece of copyrighted artwork.

Hundreds of personalized inscribed planks make up this historic boardwalk.

Plymouth's huge yet little-known memorial to the Pilgrims.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

The only Florida state park with publicly accessible caves.

One car at a time please.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A giant telephone commemorates the last "crank" call ever made in the U.S.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

The homestead of American patriot John Adams.

This small shop walked so America could run on Dunkin'.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The Boston square dedicated to the dark poet who was born nearby.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

These whimsical works of art tell the story of the city's past and present.

Ice cream stand, snack bar, and time capsule of milk conveyance.