Thap Lan National Park is in the Sankamphaeng Range in Prachinburi, Nakhon Ratchasima Provinces, Thailand. Established as a national park on 23 December 1981, it was the country's 40th national park. Its attractions include Lan Forest and Recreational Garden; Namtok Thap Lan; Thap Lan Reservoir; Namtok Huai Yai; Lam Mun Bon Dam; Hat Chom Tawan.