Not long ago, Prague was hailed—in hushed tones—as one of the greatest European cities vacationers had yet to discover. Those days are gone, and the city is now well-known as a major destination for art, history, culture, and authenticity. Naturally, its prices have grown along with its reputation. With these insider tips for a freebie-filled vacation, you can enjoy the best of the Golden City without spending an ounce of gold.