Germany
If take the S Bahn train and you hear an announcement about "ersatz" autobus. Get off the train and enjoy the "rail replacement bus service".
Up to 5 adults can travel on a Kleingruppekarte - not shown on the English pages of the S-Bahn website - for 15.70 euros, 1 adult day card = 6.10 euros, that's some saving!
You can travel anywhere in Germany super cheap with a wochenend (weekend card) With up to 5 people on the card it may cost just £8 to have unlimited travel for the whole weekend!
Generally shops are not open on a Sunday. However the shops in train stations are The new Hauptbahnhof station on Europaplatz is huge with shops sufficient to satisfy most.
Search Been there