On The Blue Gate, mark the white lookout tower south of the Warehouse Complex

How do you complete "On The Blue Gate, mark the white lookout tower south of the Warehouse Complex"?

This is step 2 of 4 in Back on Top, given by Tianwen. It is completed on Buried City, Dam Battlegrounds, The Blue Gate and The Spaceport. The exact location is marked on the Buried City map.

• Back on Top
• Buried City
• Dam Battlegrounds
• The Blue Gate
• The Spaceport

What are the other objectives in Back on Top?

Back on Top has 4 objectives in total: On Dam Battlegrounds, mark the Pattern House, On The Blue Gate, mark the white lookout tower south of the Warehouse Complex, On Spaceport, mark the South Trench Tower and On Buried City, mark the building with the mural in the Buried Properties.