Valentine Cave is one of the more popular
lava tubes to visit in the park. It is easily accessible, and the passages are relatively tall and wide. In 2019,
NASA used the cave as a test for the
CaveR rover deployed by the Biologic and Resource Analog Investigations in Low Light Environments project. The goal of the project was to develop the capability to detect life on the walls of volcanic caves from afar. The team's first descent occurred at Valentine Cave. Smooth walls around high and walkways up to wide made it a practical place to drive a rover, and its well preserved lava flow features are similar to what are expected inside a
Martian lava cave. ==References==