Lava+Tube+2

A good place for a base? Scientists predict that some lunar pits lead to lava tubes like the one seen here in Hawaii Volcanoes National Park. The moon has similar tunnels, which are left behind after molten lava flows beneath the surface.

A good place for a base? Scientists predict that some lunar pits lead to lava tubes like the one seen here in Hawaii Volcanoes National Park. The moon has similar tunnels, which are left behind after molten lava flows beneath the surface. Photo Frank Schulenberg/Creative Commons