diff --git a/backend/src/parameters/amenity_selectors.yaml b/backend/src/parameters/amenity_selectors.yaml
index 87b4b42..7d0fabc 100644
--- a/backend/src/parameters/amenity_selectors.yaml
+++ b/backend/src/parameters/amenity_selectors.yaml
@@ -45,7 +45,6 @@ sightseeing:
     - gallery
     - artwork
     - aquarium
-
   historic: ''
   amenity:
     - planetarium
diff --git a/backend/src/utils/landmarks_manager.py b/backend/src/utils/landmarks_manager.py
index 68dcb2e..f205132 100644
--- a/backend/src/utils/landmarks_manager.py
+++ b/backend/src/utils/landmarks_manager.py
@@ -94,6 +94,8 @@ class LandmarkManager:
         if preferences.shopping.score != 0:
             score_function = lambda score: score * 10 * preferences.shopping.score / 5
             current_landmarks = self.fetch_landmarks(bbox, self.amenity_selectors['shopping'], preferences.shopping.type, score_function)
+            # set time for all shopping activites :
+            for landmark in current_landmarks : landmark.duration = 45
             all_landmarks.update(current_landmarks)
 
 
@@ -246,11 +248,11 @@ class LandmarkManager:
                 image_url = None
                 name_en = None
 
-                # remove specific tags
+                # Adjust scoring
                 skip = False
                 for tag in elem.tags().keys():
                     if "pay" in tag:
-                        # payment options are a good sign
+                        # payment options are misleading and should not count for the scoring.
                         score += self.pay_bonus
 
                     if "disused" in tag:
@@ -263,10 +265,12 @@ class LandmarkManager:
                         score += self.wikipedia_bonus
 
                     if "viewpoint" in tag:
+                        # viewpoints must count more
                         score += self.viewpoint_bonus
                         duration = 10
 
                     if "image" in tag:
+                        # images must count more
                         score += self.image_bonus
 
                     if elem_type != "nature":
@@ -282,6 +286,7 @@ class LandmarkManager:
                             skip = True
                             break
 
+                    # Extract image, website and english name
                     if tag in ['website', 'contact:website']:
                         website_url = elem.tag(tag)
                     if tag == 'image':
@@ -295,10 +300,9 @@ class LandmarkManager:
                 score = score_function(score)
                 if "place_of_worship" in elem.tags().values():
                     score = score * self.church_coeff
-                    duration = 15
+                    duration = 10
                 
-                elif "museum" in elem.tags().values():
-                    score = score * self.church_coeff
+                elif "museum" in elem.tags().values() or "aquarium" in elem.tags().values() or "planetarium" in elem.tags().values():
                     duration = 60
                 
                 else: