For adventurers and armchair travelers, it's an unforgettable and inspiring year. Here are hundreds of exciting destinations in full color. Visit Krakow's Ryenek Glowny, the most authentic medieval market square in Europe. The lush Siwa Oasis of Egypt where Alexander the Great passed through in 331 B.C. And Istanbul 's dazzling Topkapi Palace, once home to 40,000 people. 250,000 print. (Travel)