Mount St. Helens
- Washington

photo: Lila Musso (CC BY-SA 4.0)
Established in 1982 to designate 110,000 acres around the infamous volcano for research, recreation and education, the Mount St. Helens National Volcanic Monument is an unforgettable adventure. Seasonal activities include hiking, fishing, camping and snow sports. If you want to make the trek to the summit of the volcano, though, make sure to get a permit in advance.