"We need binoculars to spot the biters from a safe distance. Unfortunately, the last pair was taken by Kumi on his fatal trip through the bay. If you manage to find some, please give it to Santiago. REWARD! PS. Check the high spots like antennas or roof tops - scouts usually observe the area from there."
A nearby antenna safe zone is sure to have binoculars on one of its platforms. Provided you have unlocked it, there won't be any infected around. If you have not unlocked this safe zone, there will be a goon in front of it.