A would recommend spending 7 days in Central Europe at a minimum. This is enough time to get in some sightseeing in Prague, Vienna, and Budapest. If you have more time, it’s easy to spend at least three days in each of the big cities, and a day here and there at smaller towns along the route. Should I go to Vienna or Prague or Budapest?
Day 2 of Prague Itinerary 2 days – Visit Prague Castle, St Vitus Cathedral, St George Basilica, Golden Lane, Old Royal Palace and Royal Gardens, Dancing House. Visiting Prague Castle – UNESCO World Heritage Site. Mihulka Powder Tower (Prašná věž Mihulka) St Vitus Cathedral. St George Basilica.
Three days in Prague is enough to eat all the things and see a whole lot, too. I recommend budgeting time into your days to simply relax, shop, and wander in Old Town, as it was a real highlight. Planning Your 3-Day Prague Itinerary