This image from NASA 2001 Mars Odyssey spacecraft shows the complex surface on the northeastern flank of Arsia Mons. The channel-like features and collapse pits are likely all due to subsurface lava tubes.
This image from NASA 2001 Mars Odyssey spacecraft shows the complex surface on the northeastern flank of Arsia Mons. The channel-like features and collapse pits are likely all due to subsurface lava tubes.