diff --git a/src/engine/mbEnums.java b/src/engine/mbEnums.java
index c75d7a05..1ef6443e 100644
--- a/src/engine/mbEnums.java
+++ b/src/engine/mbEnums.java
@@ -2732,7 +2732,7 @@ public class mbEnums {
         DIAMOND(1580010, 1540225085, -1730704107, 2000, 20),
         GALVOR(1580017, -1683992404, -1596311545, 2000, 5),
         IRON(1580002, -1673518119, 2504297, 2000, 20),
-        LUMBER(1580004, 1628412684, -1603256692, 10000, 100),
+        LUMBER(1580004, -1628412684, -1603256692, 10000, 100),
         MANDRAKE(1580007, 1519910613, 1191391799, 1000, 10),
         MITHRIL(1580021, 626743397, -1761257186, 500, 5),
         OAK(1580005, -1653034775, 74767, 3000, 30),
diff --git a/src/engine/objects/City.java b/src/engine/objects/City.java
index 8f674de8..eb173614 100644
--- a/src/engine/objects/City.java
+++ b/src/engine/objects/City.java
@@ -306,8 +306,22 @@ public class City extends AbstractWorldObject {
             if (city.parentZone == null)
                 continue;
 
-            //can't repledge to a guild you're already part of
+            // Can't teleport to something without a tree
+
+            if (city.getTOL() == null)
+                continue;
+
+            // No abandoned cities
+
+            if (city.getTOL().getGuild().isEmptyGuild())
+                continue;
+
+            // No destroyed cities
 
+            if (city.getTOL().getRank() == -1)
+                continue;
+
+            //can't repledge to a guild you're already part of
             if (repledge && city.getGuild().equals(playerCharacter.guild))
                 continue;
 
diff --git a/src/engine/objects/Mine.java b/src/engine/objects/Mine.java
index dabfb557..553c1036 100644
--- a/src/engine/objects/Mine.java
+++ b/src/engine/objects/Mine.java
@@ -220,8 +220,7 @@ public class Mine extends AbstractGameObject {
         // Only inactive mines are returned.
 
         for (Mine mine : Mine.mineMap.keySet()) {
-            if (mine.owningGuild.getObjectUUID() == guildID &&
-                    mine.isActive == false)
+            if (mine.owningGuild.getObjectUUID() == guildID)
                 mineList.add(mine);
         }
         return mineList;
diff --git a/src/engine/workthreads/DestroyCityThread.java b/src/engine/workthreads/DestroyCityThread.java
index 9c5b2050..0a9dd5f7 100644
--- a/src/engine/workthreads/DestroyCityThread.java
+++ b/src/engine/workthreads/DestroyCityThread.java
@@ -95,6 +95,12 @@ public class DestroyCityThread implements Runnable {
             if (cityBuilding == null)
                 continue;
 
+            // check null bluepritn and log error
+            if (cityBuilding.getBlueprint() == null){
+                Logger.error("Null Blueprint for building ID: " + cityBuilding.getObjectUUID());
+                continue;
+            }
+
             // Do nothing with the banestone.  It will be removed elsewhere
 
             if (cityBuilding.getBlueprint().getBuildingGroup().equals(mbEnums.BuildingGroup.BANESTONE))