Seoul Forest (Korean: 서울숲; RR: Seoul Sup) is a large park in Seongdong-gu, Seoul, South Korea. It is open year-round, and admission is free. Seoul Forest opened in June 2005. The city government spent 235.2 billion won in development. It is the third largest park in Seoul city. Seoul Forest is a massive park dotted with over 400,000 trees and 100 different animals.