A cave is a natural opening in the ground extending beyond the zone of light and large enough to permit the entry of man. Occurring in a wide variety of rock types and caused by widely differing geological processes, caves range in size from single small rooms to interconnecting passages many miles long.
Cuban passport. Cuban passports are issued to citizens of Cuba to facilitate international travel. They are valid for 6 years from the date of issuance, but have to be extended every 2 years. The cost of this passport is about US$500 (CUC 500) for every two years if one person lives in the United States. Until January 14, 2013, the Cuban government required that all Cuban citizens and foreigners such as foreign students that live in Cuba desiring to leave the country would have to obtain an exit permit (Spanish: Permiso de Salida).
How much does it cost to get a passport? A US passport book costs $100 USD for adults and is valid for ten years. For children the passport costs less but is only valid for five years. A US passport card costs $45 USD and is also valid for ten years for adults, $35 USD for children and valid for five years. A Canadian passport costs $87 CAD and is valid for five years. Here are some resources to help you find out how to apply for and get a passport: