Re: Guppies in Europe
My recommendation:
Switzerland, Austria & Italy
Suggested plan (which you can easily do with the Interrail pass):
Day 1: Morning flight from London to Geneva (easyjet flies there from Stansted) - spend the whole day there and take an evening train to Interlaken - overnight in Interlaken
Day 2: Spend a few hours in Interlaken and its surroundings, move on to Luzern by train and then Zurich - overnight stay in Zurich
Day 3: Morning Train from Zurich to Innsbruck - you can walk around this beautiful city in a few hours - in the afternoon move on to Salzburg by train - overnight in Salzburg
Day 4: Spend the whole day in Salzburg and its surroundings (including Hallstatt if possible) - take an evening train to Klagenfurt
Day 5: Visit Minimundus in Klagenfurt - travel to Villach around lunch time - spend the afternoon in Villach city centre - take the evening train from Villach to Venice (departure 7.36 PM, arrival 10.32 PM) - overnight in Venice
Day 6: Spend the whole day in Venice and visit its famous sights - afternoon train to Rome, where you will arrive in the night - overnight in Rome
Day 7: Spend the whole day in Rome from where you will fly back to the UK (Ryanair flies from Rome to London Luton and London Stansted)