Scientists suspect Mars is home to volcanic caves, which could be fascinating destinations for future rovers or human explorers. Pits like the one the MRO is investigating could be gateways to these underground worlds.
This particular chasm isn't giving up any secrets just yet. "We can't obviously see any tunnels in the visible walls, but they could be in the other walls that aren't visible," Beyer wrote.
What lies beneath? For now that'll have to remain a Mars mystery.