Calp (Calpe), Spain

With a population of just 27,616, Calpe is a sleepy coastal town that relies heavily on tourism. The economy is dominated by fishing and hospitality, but the Prime Meridian actually runs right through the town, a quirky geographic fact. While the area has a rich history dating back to the Bronze Age, today's visitors will find a persistent bureaucratic headache as the town struggles to maintain its ancient architecture and natural sites like the Penyal d'Ifac Natural Park. Overall, Calpe is best suited for retirees and those seeking a laidback, sun-soaked lifestyle on Spain's Costa Blanca.