The Yellowstone National Park is the oldest national park in the USA and held to be even the oldest in the world, founded on March 1st in 1872. It is primarily located in the US state of Wyoming, although in the north and west it also extends into the states of Montana and Idaho. It is known for its incredible wildlife, its breathtaking landscape and its many geothermal features, such as the Old Faithful Geyser or the Mammoth Hot Springs.
In the summer of 2015 I visited the Yellowstone National Park for the first and so far only time. It was such a great expierence! I have seen quite a few national parks in the US but the Yellowstone NP is one of my favourite, I sure will be back soon.
For more information on one the most famous and beautiful national parks in the world, please visit the park's website.