There are several hour-long lines for people to reach the summit now, meaning that people have to brave the harsh weather and altitude to stand and wait their turn to take selfies at the cap of the mountain. Eleven people died while standing in line in 2019 alone.
Yellowstone National Park
There is a supervolcano that is located underneath Yellowstone National Park that could possibly erupt at any second. There is no telling when, or if, this will happen, but the threat is constantly looming over the state of California.