Two police officers stand near to a mangrove swamp used by drug traffickers to hide drugs, along Manuel Antonio national park in Quepos, 172 km (107 miles) off San Jose July 30, 2012.The lush national parks of Costa Rica have long attracted tourists from around the globe with their evergreen rainforests, white beaches and thermal springs. Recently, they have lured more unsavory visitors in the form of drug traffickers. Organized crime cartels have turned to Costa Rica's treasured nature reserves as governments wage military offensives against the gangs throughout Mexico and Central America. Picture taken July 30, 2012. To match story COSTARICA-DRUGS/ REUTERS/Juan Carlos Ulate (COSTA RICA - Tags: CRIME LAW DRUGS SOCIETY TRAVEL)