An investigation is underway in Yellowstone National Park after an employee found part of a human foot inside a shoe floating in a hot spring, according to the Independent.,The discovery was made in Abyss Pool in the southern part of the national park.,The park has no other information about the investigation to make public, park Public Affairs Officer Morgan Warthin said.,US Yellowstone Park to Partially Reopen on Wednesday After Historic Flood - Photos19 June, 12:12 GMT,Following the incident, the West Thumb Geyser Basin was closed, but later it was reopened, officials told the Associated Press.,Abyss Pool, located west of the West Thumb of Yellowstone Lake, is 53 feet deep and its temperature is about 140 degrees Fahrenheit. It is on the south side of the south loop that runs through the park.