Based on the directions provided, the grocery store is located directly behind the old church that should be visible on the right-hand side, opposite the market. The old church itself is situated where the aforementioned major crossing is beneath the road, and after turning left by the canal. However, the specific location next to the grocery store isn't explicitly mentioned, so we cannot determine exactly what is directly next to it in the information given. You'll need more details to find out the exact neighboring place or landmark.