Bulgaria's skiing boomtown sparks dire nature warnings "Unlimited Ski&Fun!" promises a pamphlet touting the Bansko ski resort, a magnet for bargain-hunting holidaymakers in southwest Bulgaria. But nature lovers are demanding limits to the growth of the bustling resort carved into the majestic pine forests of Pirin National Park, a UNESCO World Heritage site since 1983. A natural sound version of an AFPTV report.