89 to Southwest Entrance. The three other entrances ... and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.

It’s located in the town of Mill Creek, just outside of the main entrance of Lassen Volcanic National Park. The park is ...

Skip Yosemite’s crowds and explore otherworldly landscapes with lava fields and steaming fumaroles along epic hikes in this California hidden gem.