Hats Off: Yellowstone Shows Off Hundreds of Caps Blown Into Hot Springs This Year

Pizza Boxes, Trash And Hundreds Of Hats Removed From Yellowstone Thermal Areas

More than 13,000 pieces of garbage have been retrieved this year from hydrothermal areas in Yellowstone National Park. That includes hundreds of hats, pizza boxes and a Birkenstock sandal. But it's better than it used to be when Grand Prismatic Spring was nicknamed "garbage can."

Hats Off: Yellowstone shows off hundreds of caps blown into hot springs this year

The park draws over 4 million visitors a year, with the vast thermal pools and hot springs among the most popular attractions.

Yellowstone employees recover over 300 hats from hydrothermal areas

Be sure to hold on to your hats (and pizza) when near a boiling hot vent.