Not millions of years older, but I do believe thousands of years older. The date when Modern humans emerged has moved back thousands of years farther than would have been believed just a short time ago, and in my opinion will eventually recede farther than we would accept today.
There are many pyramidal shapes on Mars which appear to be perhaps millions of years abandoned. But I would still like to have a plausible explanation for the six sided vortex at the North Pole of Saturn.