Four men tried to walk into the 160-degree geothermal hot springs in Yellowstone National Park.

Four men behind the travel vlog High on Life were thrust under fire in early May for walking off the boardwalk area at Yellowstone's Grand Prismatic Spring. The thermal spring is one of the largest in the United States, and its water hovers around 160 degrees. Danger to the tourists aside, it is also an extremely delicate ecosystem. After drawing ire from the public, the foursome issued an apology.