The resting place of a Civil War celebrity's amputated limb.

A fitting attraction for the corn capital of the world.

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.

The world's longest known cave system.

The remains of this visionary community can still be found much as it was a century ago.

The longest navigable underground river in the United States is home to countless blind and albino animals.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

A gigantic 10-foot tall stone man.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

The largest earthwork effigy in the world.

An office built to look like a giant basket.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

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