Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

A hundred-year-old museum filled with giant physics toys and experiments designed by grad students.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

"Looks so real, it's scary!"

The metal spire on the roof of this tower was intended as an airship docking station, but it was never actually used.