In the (somewhat) secret tunnel at Red Rocks, you won't need a geologist to tell you about the layers of rock (stars) that make the history of the amphitheater. 

There's pretty much just one place where it's OK to graffiti our sacred Red Rocks Amphitheatre, and it's a tunnel that typically only performers have access to. Maren Morris performed last night (August 20) with Niall Horan, marking the anniversary of when she was here last summer during the solar eclipse with Sam Hunt.

Last night, she shared a snap on her Instagram story of where she's left her mark on Red Rocks, and well, I guess that's her church.