Devils Postpile National Monument is a gem of the Eastern Sierra. Once a part of Yosemite National Park, Devils Postpile is now its own standalone national attraction. The name refers to a cliff of columnar basalt exposed by glaciation. The NPS website does a far better job of explaining the formation of the columns, so I won’t even go there.
The Crowley Lake Columns are a little Eastern Sierra secret. If you’re a good internet creeper, you’ll be able to find directions to them with enough digging.
The Ancient Bristlecone Pine Forest is one of California’s many gems. Here in the xeric alpine environment, some of the oldest non-clonal living organisms thrive. The Visitor Center is located next to Schulman Grove, home to the Methuselah tree, the oldest tree alive until the discovery of one slightly older in the area.