The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The "Seinfeld" diner.

The first declared National Monument in the United States.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

More than 5,000 contemporary and "historic" mustards from around the world.

Where a brain, a beauty, a jock, a rebel, and a recluse met one Saturday and changed their lives forever.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

A military museum and library dedicated to the citizen soldier.

This steep-walled ravine contains animal-shaped formations made from sandstone.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

The remnants of this Douglas fir predate Columbus's arrival in North America.