<div class="description">
<ul><li><b>Scope and content:</b>  The original finding aid described this photograph as:</li></ul><p>Original Caption: Subway Cave, a lava tube north of Lassen Volcanic National Park, on Hwy. 89. Lava Beds National Monument encompasses over 46,500 acres and contains the largest concentration of lava tube caves in the United States. While lava tubes are not unusual in volcanic areas, the vast quantity found at Lava Beds is.
</p><p>Location: (41.705° N 121.516° W)
</p>
Status: Public domain. National Park Service, 1964</div>
<div class="fn value">
Unknown author<span style="display: none;">Unknown author</span> or not provided</div>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>