If you’re looking for culture, charm, and history in equal measure, Eastern Europe is the region of your dreams. You’ll hit up four countries in seven days, but don’t fret about missing anything — there’ll be loads of free time to explore local attractions and really get a feel for Kraków, Prague, Berlin, and Budapest. Cobblestone streets, thermal baths, and castles await, and with transport by trains and buses and a load of adventuresome new friends by your side, you’ll come away with memories of exciting days and epic nights. Hotels/Hostels (5 nts, multi-share with 3-6 people), overnight train (1 nt).