A number of tourists were left shocked after a large bison approached and stood within a few feet of them at Yellowstone National Park, Wyoming.

The footage filmed on July 22 shows the "massive beast" standing next to the chair the tourists were sitting on just moments before.

The filmer told Newsflare: "A bison approached us at Yellowstone and we retreated to our vehicle. We had been watching this bison for a while down the road because he kept standing in the middle of the road blocking traffic.

"I wasn’t scared because we were a good distance away from the bison and there was a truck between us and the animal. I think I was just in shock that this massive beast was so close to our chair where we were just sitting. A second bison came up behind him and stared the chair for a long time.

"We thought that bison was going to attack the chair but it never did. Both bison continued walking and crossed the street again and walked out of sight."

A bison approached us at Yellowstone and we retreated to our vehicle.It happened in Yellowstone National Park. I was with my family. The bison stayed in that area 5-10 minutes. We had been watching this bison for a while down the road because he kept standing in the middle of the road blocking traffic. He then walked down the street and then turned into the parking lot and to this grassy area. I wasn’t scared because we were a good distance away from the bison and there was a truck between us and the animal. I think I was just in shock that this massive beast was so close to our chair where we were just sitting. A second bison came up behind him and stared the chair for a long time. Several minutes. We thought that bison was going to attack the chair but it never did. I thought I was recording the second bison but I guess I didn’t hit record. Both bison continued walking and crossed the street again and walked out of sight. Yes you can use my name.