I am 25 and I will be travelling with my boyfriend. I just love the idea of visiting castles and cathedrals which from looking is very plentiful in Prague. Wow I'm glad I'm talking to an expert! We are going to be there a full week but are debating a side trip to Berlin if the train tickets aren't too pricey. Do you know the best way to buy train tickets? Is it better to buy online or when we get there and if online what website is best? Thanx!