Take a drunken tour inside the world's largest known geode.

Deep scars on the earth left by the Ice Age.

The only presidential monument to display a late POTUS's actual casket.

The angel of death appears to weep black tears at this grave marker.

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

This tower-tomb honors a president who only held office for a little over a month but dedicated his life to his country.

The first declared National Monument in the United States.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

The largest ancient burial mound in Ohio.

The largest earthwork effigy in the world.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.