Looking to experience the best urban environments on the planet during your holiday time this year? There are many worthwhile cities to spend time in, but only a few can be considered to be top tier. The best city breaks for 2015 mix modernism, culture, along with just the right amount of exotic spice. Let's get started... 1) Budapest With a rich medieval history, some of Central Europe's best nightlife, and numerous relaxing thermal baths scattered throughout the city, Budapest is one of