Today's Brain Game is a poem wot I writ myself. I know, don't quit my day job. (But this is my day job.) Good luck!

They're America's favorite rock group
A quartet with notable flair
One wears a beard, one specs and a 'stache,
And the other two love their long hair

You can see them in person near Keystone
Although none of them are still alive
The four of them have been together
Since nineteen and, oh, twenty-five.

Here is the ANSWER.

THE SOLUTION:

Mount Rushmore.

George, Tom, Rosie, and Fang