European city escape on a budget? We're lookin' at you, Budapest. There are enough free activities in this charming, historical destination that you can spend your money on other important things . . . like food. Take a free self-guided city tour, gawk at St. Stephen's Basilica, and stroll Castle Hill, a Danube Riverside UNESCO World Heritage Site riddled with cool medieval things like Buda Castle, an underground labyrinth, Mattias Church, and more. With public transportation options, you can choose to get around for cheap as well. Lodging and eats can be affordable if you lean towards hostel-ing or grabbing meals at places like the Central Market Hall. Booking your travel out of the peak season window (May-September) will help with pricing, too.