Tourism in Mexico is a very large industry. Mexico has been traditionally among the most visited countries in the world according to the World Tourism Organization and it is the second most visited country in the Americas, after the United States. The most notable attractions are the Meso-American ruins, cultural festivals, colonial cities, nature reserves and the beach resorts. The nations temperate climate and unique culture – a fusion of the European and the Meso-American – make Mexico an attractive destination. The peak tourism seasons in the country are during December and the mid-Summer, with brief surges during the week before Easter and Spring break, when many of the beach resort sites become popular destinations for college students from the United States.