Created refresh button icon, and added it to the nearby_fragment_menu.xml (header of the nearby page). Created function refresh() in NearbyParentFragment.java to handle refresh functionality.

app/src/main/java/fr/free/nrw/commons/nearby/fragments/NearbyParentFragment.java

@@ -311,9 +311,22 @@ public class NearbyParentFragment extends CommonsDaggerSupportFragment
     public void onCreateOptionsMenu(@NonNull final Menu menu,
         @NonNull final MenuInflater inflater) {
         inflater.inflate(R.menu.nearby_fragment_menu, menu);
+        MenuItem refreshButton = menu.findItem(R.id.item_refresh);
         MenuItem listMenu = menu.findItem(R.id.list_sheet);
         MenuItem saveAsGPXButton = menu.findItem(R.id.list_item_gpx);
         MenuItem saveAsKMLButton = menu.findItem(R.id.list_item_kml);
+        refreshButton.setOnMenuItemClickListener(new OnMenuItemClickListener() {
+            @Override
+            public boolean onMenuItemClick(MenuItem item) {
+                try {
+                    // REFRESH BUTTON FUNCTIONALITY HERE
+                    refresh(); // handle functionality of refreshing
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
+                return false;
+            }
+        });
         listMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {
             @Override
             public boolean onMenuItemClick(MenuItem item) {
@@ -1115,6 +1128,21 @@ public class NearbyParentFragment extends CommonsDaggerSupportFragment
         }
     }
 
+    /**
+     *  Empties the Nearby local cache and reloads the Nearby map
+     */
+    private void refresh(){
+        // can either use this sort of progressDialog to display while page is refreshing
+        // or, we can put a big fat refresh icon on the page.
+        // If we stick with the progressDialog, we should make a new one called refreshDialog,
+        // since itll interfere with the one used to save as GPX/KML
+
+        // When the map initially loads, there is already a big fat refresh circle that is displayed so maybe itll be good to use that instead of dialog
+//        progressDialog.setTitle("REFRESHING NEARBY"); // PLACEHOLDER UNTIL WE
+//        progressDialog.show();
+//        progressDialog.hide();
+    }
+
     private void savePlacesAsKML() {
         final Observable<String> savePlacesObservable = Observable
             .fromCallable(() -> nearbyController

app/src/main/res/drawable/ic_refresh_24dp_nearby.xml

@@ -0,0 +1,18 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+  android:width="@dimen/half_standard_height"
+  android:height="@dimen/half_standard_height"
+  android:viewportHeight="24.0"
+  android:viewportWidth="24.0">
+
+    <group
+      android:scaleX="1.0"
+    android:scaleY="1.0"
+    android:translateX="-0.0"
+    android:translateY="-0.0">
+
+    <path
+      android:fillColor="?attr/menu_item_tint"
+      android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4c-4.42,0 -7.99,3.58 -7.99,8s3.57,8 7.99,8c3.73,0 6.84,-2.55 7.73,-6h-2.08c-0.82,2.33 -3.04,4 -5.65,4 -3.31,0 -6,-2.69 -6,-6s2.69,-6 6,-6c1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z"/>
+
+</group>
+  </vector>

app/src/main/res/menu/nearby_fragment_menu.xml

@@ -1,17 +1,25 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto">
 
+  <item android:id="@+id/item_refresh"
+    android:title="Refresh"
+    app:showAsAction="ifRoom"
+    android:icon="@drawable/ic_refresh_24dp_nearby" />
+
   <item android:id="@+id/list_sheet"
     android:title="@string/list_sheet"
     app:showAsAction="ifRoom|withText"
     android:icon="@drawable/ic_list_white_24dp"
     />
+
   <item android:id="@+id/list_item_gpx"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:title="Save as GPX file" />
+
   <item android:id="@+id/list_item_kml"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:title="Save as KML file" />
+
 </menu>