Hossa National Park, Finland

Founded in 2017 to commemorate Finland’s centenary of independence, the country’s 40th national park stretches over 11,000 hectares of glittering lakes and dense forests. Highlights include Julma Ölkky, a 3km-long lake-filled canyon that narrows to just 10m wide; Öllön, a 40m-deep lake where scuba-diving will be possible; and Värikallio, a river canyon where 4000-year-old rock paintings can be viewed from a metal platform.