Jackson is in Northwest Wyoming, close to the south end of Grand Teton National Park. It is the gateway to two of the United States' best-known national parks, Grand Teton itself and nearby Yellowstone. Many famous people maintain vacation homes in and around this area. The combined elements of beautiful mountain scenery, Old West heritage, tourist traps and celebrity residents give this small town a unique atmosphere both cosmopolitan and frontier. The terms Jackson and Jackson Hole are often mistakenly interchanged. Jackson is the name of the town, while Jackson Hole refers to either the greater valley area, the Jackson Hole Ski Resort, or the airport. While most tourists don’t know the difference, it can be a sore spot for the locals. Be aware that Jackson transforms from a popular ski town during the winter into an all-out tourist mecca during the summer. Meanwhile, in the spring and fall seasons, the town can feel empty as only the 6,000 or so year-round residents remain (and many of them may leave during this time as well) and many of the hotels and restaurants close for the season. Each of the seasons have their pluses and minuses depending on the visitor's expectations and desires, but it pays to know what time of year is best for what activity, especially in Jackson's unique high-altitude environment.