Dubrovnik, the 'Pearl of the Adriatic' was once the best-kept secret in the Mediterranean region. Today this Croatian city has become one of the most popular tourist hotspots in Europe. Dubrovnik is a UNESCO World Heritage site and mesmerizes visitors with its picturesque red-roofed medieval houses, white-stone city wall, Gothic Renaissance palaces and crystal clear turquoise sea. Featured as one of the '50 Places of a Lifetime' in National Geographic Traveler magazine (2010), the south European nation of Montenegro is one of the fastest growing tourism destinations in the world. Visitors flock to the Balkan country's pristine beaches, picturesque medieval towns and excellent infrastructure.