Search for the missing helmet

How do you complete "Search for the missing helmet"?

This is step 2 of 3 in Keeping the Memory, given by Celeste. It is completed on Dam Battlegrounds. The exact location is marked on the Dam Battlegrounds map.

• Keeping the Memory
• Dam Battlegrounds

What are the other objectives in Keeping the Memory?

Keeping the Memory has 3 objectives in total: Reach the wreckage in the Formicai Hills, Search for the missing helmet and Return the helmet to the memorial.