I really like going to Yellowstone National Park, i like hiking there its located in Wyoming, Montana and Idaho so its large
wow that sounds cool. ive never gone hiking. how big is the park?
Its the first national park in the US, and in the world, its one of the largest also, 
when was it established?
It was established in 1872, by the US Congress and signed into law by president Ulysses S. Grant
is it open to the public for free or do you have to pay to get in?
The majority of it is open,  the park is known for its wildlife and its many geothermal features
what type of wildlife does it have? Is it safe to wander at night alone there?