diff --git a/minecraft-server/Dockerfile b/minecraft-server/Dockerfile
index e1f8a32f..9d8c84b5 100644
--- a/minecraft-server/Dockerfile
+++ b/minecraft-server/Dockerfile
@@ -12,7 +12,9 @@ RUN wget -O /usr/bin/jsawk https://github.com/micha/jsawk/raw/master/jsawk
 RUN chmod +x /usr/bin/jsawk
 RUN useradd -M -s /bin/false --uid 1000 minecraft \
   && mkdir /data \
-  && chown minecraft:minecraft /data
+  && mkdir /config \
+  && mkdir /mods \
+  && chown minecraft:minecraft /data /config /mods
 
 EXPOSE 25565
 
@@ -20,6 +22,8 @@ COPY start.sh /start
 COPY start-minecraft.sh /start-minecraft
 
 VOLUME ["/data"]
+VOLUME ["/mods"]
+VOLUME ["/config"]
 COPY server.properties /tmp/server.properties
 WORKDIR /data
 
@@ -32,4 +36,4 @@ ENV UID=1000
 ENV MOTD A Minecraft Server Powered by Docker
 ENV JVM_OPTS -Xmx1024M -Xms1024M
 ENV TYPE=VANILLA VERSION=LATEST FORGEVERSION=RECOMMENDED LEVEL=world PVP=true DIFFICULTY=easy \
-  LEVEL_TYPE=DEFAULT GENERATOR_SETTINGS=
+  LEVEL_TYPE=DEFAULT GENERATOR_SETTINGS= WORLD=
diff --git a/minecraft-server/README.md b/minecraft-server/README.md
index 3e57f472..88a41392 100644
--- a/minecraft-server/README.md
+++ b/minecraft-server/README.md
@@ -104,7 +104,13 @@ but you can also choose to run a specific version with `-e FORGEVERSION=10.13.4.
         -e TYPE=FORGE -e FORGEVERSION=10.13.4.1448 \
         -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
 
-In order to add mods, you will need to attach the container's `/data` directory
+In order to add mods, you have two options.
+
+### Using the /data volume
+
+This is the easiest way if you are using a persistent `/data` mount.
+
+To do this, you will need to attach the container's `/data` directory
 (see "Attaching data directory to host filesystem”).
 Then, you can add mods to the `/path/on/host/mods` folder you chose. From the example above,
 the `/path/on/host` folder contents look like:
@@ -127,6 +133,19 @@ up:
     docker stop mc
     docker start mc
 
+### Using separate mounts
+
+This is the easiest way if you are using an ephemeral `/data` filesystem,
+or downloading a world with the `WORLD` option.
+
+There are two additional volumes that can be mounted; `/mods` and `/config`.  
+Any files in either of these filesystems will be copied over to the main
+`/data` filesystem before starting Minecraft.
+
+This works well if you want to have a common set of modules in a separate 
+location, but still have multiple worlds with different server requirements
+in either persistent volumes or a downloadable archive.
+
 ## Using Docker Compose
 
 Rather than type the server options below, the port mappings above, etc
@@ -206,6 +225,8 @@ shortcut values:
 
 * creative
 * survival
+* adventure
+* spectator (only for Minecraft 1.8 or later)
 
 For example:
 
@@ -258,6 +279,28 @@ where the default is "world":
 **NOTE:** if running multiple containers be sure to either specify a different `-v` host directory for each
 `LEVEL` in use or don't use `-v` and the container's filesystem will keep things encapsulated.
 
+### Downloadable world
+
+Instead of mounting the `/data` volume, you can instead specify the URL of
+a ZIP file containing an archived world.  This will be downloaded, and
+unpacked in the `/data` directory; if it does not contain a subdirectory
+called `world/` then it will be searched for a file `level.dat` and the 
+containing subdirectory renamed to `world`.  This means that most of the
+archived Minecraft worlds downloadable from the Internet will already be in
+the correct format.
+
+The ZIP file may also contain a `server.properties` file and `modules`
+directory, if required.
+
+    docker run -d -e WORLD=http://www.example.com/worlds/MySave.zip ...
+
+**NOTE:** Unless you also mount `/data` as an external volume, this world
+will be deleted when the container is deleted.
+
+**NOTE:** This URL must be accessible from inside the container.  Therefore,
+you should use an IP address or a globally resolveable FQDN, or else the
+name of a linked container.
+
 ## JVM Configuration
 
 ### Memory Limit
diff --git a/minecraft-server/server.properties b/minecraft-server/server.properties
index ddad1242..598256ac 100644
--- a/minecraft-server/server.properties
+++ b/minecraft-server/server.properties
@@ -21,7 +21,7 @@ online-mode=true
 resource-pack=
 pvp=true
 difficulty=1
-enable-command-block=false
+enable-command-block=true
 player-idle-timeout=0
 gamemode=0
 max-players=20
diff --git a/minecraft-server/start-minecraft.sh b/minecraft-server/start-minecraft.sh
index 68e0973c..92513ab0 100755
--- a/minecraft-server/start-minecraft.sh
+++ b/minecraft-server/start-minecraft.sh
@@ -16,22 +16,25 @@ if [ ! -e /data/eula.txt ]; then
 fi
 
 echo "Checking version information."
-case $VERSION in
-  LATEST)
+case "X$VERSION" in
+  X|XLATEST|Xlatest)
     VANILLA_VERSION=`wget -O - https://s3.amazonaws.com/Minecraft.Download/versions/versions.json | jsawk -n 'out(this.latest.release)'`
   ;;
-  SNAPSHOT)
+  XSNAPSHOT|Xsnapshot)
     VANILLA_VERSION=`wget -O - https://s3.amazonaws.com/Minecraft.Download/versions/versions.json | jsawk -n 'out(this.latest.snapshot)'`
   ;;
-  *)
+  X[1-9]*)
     VANILLA_VERSION=$VERSION
   ;;
+  *)
+    VANILLA_VERSION=`wget -O - https://s3.amazonaws.com/Minecraft.Download/versions/versions.json | jsawk -n 'out(this.latest.release)'`
+  ;;
 esac
 
 cd /data
 
 echo "Checking minecraft / forge type information."
-case $TYPE in
+case "$TYPE" in
   VANILLA)
     SERVER="minecraft_server.$VANILLA_VERSION.jar"
 
@@ -49,7 +52,7 @@ case $TYPE in
       ;;
 
       *)
-        norm=`echo $VANILLA_VERSION | sed 's/^\([0-9]\+\.[0-9]\+\).*/\1/'`
+        norm=`echo "$VANILLA_VERSION" | sed 's/^\([0-9]\+\.[0-9]\+\).*/\1/'`
       ;;
     esac
 
@@ -76,7 +79,7 @@ case $TYPE in
     FORGE_INSTALLER="forge-$normForgeVersion-installer.jar"
     SERVER="forge-$normForgeVersion-universal.jar"
 
-    if [ ! -e $SERVER ]; then
+    if [ ! -e "$SERVER" ]; then
       echo "Downloading $FORGE_INSTALLER ..."
       wget -q http://files.minecraftforge.net/maven/net/minecraftforge/forge/$normForgeVersion/$FORGE_INSTALLER
       echo "Installing $SERVER"
@@ -86,6 +89,31 @@ case $TYPE in
 
 esac
 
+# If supplied with a URL for a world, download it and unpack
+case "X$WORLD" in
+  X[Hh][Tt][Tt][Pp]*[Zz][iI][pP])
+    echo "Downloading world via HTTP"
+    echo "$WORLD"
+    wget -q -O - "$WORLD" > /data/world.zip
+    echo "Unzipping word"
+    unzip -q /data/world.zip
+    rm -f /data/world.zip
+    if [ ! -d /data/world ]; then
+      echo World directory not found
+      for i in /data/*/level.dat; do
+        if [ -f "$i" ]; then	
+          d=`dirname "$i"`
+          echo Renaming world directory from $d
+          mv -f "$d" /data/world
+        fi
+      done
+    fi
+    ;;
+  *)
+    echo "Invalid URL given for world: Must be HTTP or HTTPS and a ZIP file"
+    ;;
+esac
+
 if [ ! -e server.properties ]; then
   cp /tmp/server.properties .
 
@@ -131,16 +159,16 @@ if [ ! -e server.properties ]; then
 
   if [ -n "$DIFFICULTY" ]; then
     case $DIFFICULTY in
-      peaceful)
+      peaceful|0)
         DIFFICULTY=0
         ;;
-      easy)
+      easy|1)
         DIFFICULTY=1
         ;;
-      normal)
+      normal|2)
         DIFFICULTY=2
         ;;
-      hard)
+      hard|3)
         DIFFICULTY=3
         ;;
       *)
@@ -161,6 +189,12 @@ if [ ! -e server.properties ]; then
       c*)
         MODE=1
         ;;
+      a*)
+        MODE=2
+        ;;
+      s*)
+        MODE=3
+        ;;
       *)
         echo "ERROR: Invalid game mode: $MODE"
         exit 1
@@ -193,4 +227,31 @@ if [ -n "$ICON" -a ! -e server-icon.png ]; then
   fi
 fi
 
+# Make sure files exist to avoid errors
+if [ ! -e banned-players.json ]; then
+	echo '' > banned-players.json
+fi
+if [ ! -e banned-ips.json ]; then
+	echo '' > banned-ips.json
+fi
+
+# If any modules have been provided, copy them over
+[ -d /data/mods ] || mkdir /data/mods
+for m in /mods/*.jar
+do
+  if [ -f "$m" ]; then
+    echo Copying mod `basename "$m"`
+    cp -f "$m" /data/mods
+  fi
+done
+[ -d /data/config ] || mkdir /data/config
+for c in /config/*
+do
+  if [ -f "$c" ]; then
+    echo Copying configuration `basename "$c"`
+    cp -rf "$c" /data/config
+  fi
+done
+
+
 exec java $JVM_OPTS -jar $SERVER