diff --git a/backend/src/landmarks_manager.py b/backend/src/example_landmarks_manager.py
similarity index 93%
rename from backend/src/landmarks_manager.py
rename to backend/src/example_landmarks_manager.py
index 0392245..30df6dc 100644
--- a/backend/src/landmarks_manager.py
+++ b/backend/src/example_landmarks_manager.py
@@ -1,8 +1,6 @@
 import yaml
 import logging
-import osmnx as ox
-from shapely.geometry import Point, Polygon, LineString, MultiPolygon
-
+from OSMPythonTools import cachingStrategy, overpass
 from structs.landmarks import Landmark, LandmarkType
 from structs.preferences import Preferences, Preference
 import constants
@@ -16,9 +14,8 @@ class LandmarkManager:
     logger = logging.getLogger(__name__)
 
     def __init__(self) -> None:
-        ox.settings.cache_folder = constants.OSM_CACHE_DIR
-        ox.settings.use_cache = True
-        ox.config(use_cache=True, cache_folder=constants.OSM_CACHE_DIR)
+        strategy = cachingStrategy.JSON(cacheDir=constants.OSM_CACHE_DIR)
+        self.query_builder = overpass.Overpass()
         with constants.AMENITY_SELECTORS_PATH.open('r') as f:
             self.amenity_selectors = yaml.safe_load(f)
         with constants.LANDMARK_PARAMETERS_PATH.open('r') as f:
diff --git a/backend/src/optimizer.py b/backend/src/example_optimizer.py
similarity index 100%
rename from backend/src/optimizer.py
rename to backend/src/example_optimizer.py
diff --git a/backend/src/refiner.py b/backend/src/example_refiner.py
similarity index 98%
rename from backend/src/refiner.py
rename to backend/src/example_refiner.py
index a292b73..5eb4368 100644
--- a/backend/src/refiner.py
+++ b/backend/src/example_refiner.py
@@ -10,7 +10,7 @@ from math import pi
 
 from structs.landmarks import Landmark
 from landmarks_manager import take_most_important
-from optimizer import solve_optimization, link_list_simple, print_res, get_distance
+from backend.src.example_optimizer import solve_optimization, link_list_simple, print_res, get_distance
 import constants
 
 
diff --git a/backend/src/main.py b/backend/src/main.py
index a1ff712..8a76288 100644
--- a/backend/src/main.py
+++ b/backend/src/main.py
@@ -1,4 +1,4 @@
-from optimizer import solve_optimization
+from backend.src.example_optimizer import solve_optimization
 # from refiner import refine_optimization
 from landmarks_manager import LandmarkManager
 from structs.landmarks import Landmark
diff --git a/backend/src/parameters/landmark_parameters.yaml b/backend/src/parameters/landmark_parameters.yaml
index 524b7b6..b85c89a 100644
--- a/backend/src/parameters/landmark_parameters.yaml
+++ b/backend/src/parameters/landmark_parameters.yaml
@@ -1,4 +1,4 @@
-city_bbox_side: 1500 #m
+city_bbox_side: 5000 #m
 radius_close_to: 30
 church_coeff: 0.6
 park_coeff: 1.5
diff --git a/backend/src/tester.py b/backend/src/tester.py
index 57692d2..71d82e7 100644
--- a/backend/src/tester.py
+++ b/backend/src/tester.py
@@ -4,7 +4,7 @@ from typing import List
 from landmarks_manager import LandmarkManager
 from fastapi.encoders import jsonable_encoder
 
-from optimizer import solve_optimization
+from backend.src.example_optimizer import solve_optimization
 # from refiner import refine_optimization
 from structs.landmarks import Landmark
 from structs.landmarktype import LandmarkType