added some travel info

docs/timeline.md

-# Getting there
-
-## Where?
-
-[Ziegeleipark](http://www.ziegeleipark.de/) Mildenberg Zehdenick
-Ziegelei 10
-16792 Zehdenick (OT Mildenberg)
-53° 01' 48" N, 13° 18' 27" E
-
-https://www.google.com/maps/place/Ziegeleipark+Mildenberg/@53.031938,13.306962,1331m/
-https://www.openstreetmap.org/#map=17/53.03131/13.3076
-
-## How?
-
-### via Bike
-### via Train
-### via Bus
-### via Car
-### via Plane
+# Timeline

docs/travel.md

@@ -15,5 +15,35 @@ https://www.openstreetmap.org/#map=17/53.03131/13.3076
 ### via bike
 ### via train
 ### via bus
+
+### via taxi
+
 ### via car
+
+Please do not travel via car if you have other options available to you.
+Not just because of your carbon footprint but because handling 2000+ cars and the space they consume is no small task.
+We'd prefere to use the space for villages and cool blinking stuff instead of parking space.
+
+But for some, travel by car is the only viable option, in that case:
+
+* A
+* B
+* C
+
+Please do **not** arrive with an empty tank of gas and rely on a gas station close to the location to get back home.
+Those will be overwellmed and run out of gas, leaving you stranded. This was tested 2019 and we would prefere to spare you from it.
+Please fill up your tank **bevore** you get close to the location, at best while still on the highway.
+
 ### via plane
+
+#### Berlin Schönefeld (SXF)
+
+Take the train to Berlin Südkreuz or Berlin main station and from there the train to Gransee.
+
+#### Berlin Tegel (TXL)
+
+Is closed by now and can not be used anymore
+
+#### Airport Berlin Brandenburg (BER)
+
+Is open by now and can be used.