Tucked away in the far northwest of Austria, National Park Thayatal is the country's smallest national park. However, the park also contains one of Central Europe's most biodiverse valleys. More than 90% of the park is covered by forest, and almost half of the 3,000 plant species that occur in Austria can be found here. A deep canyon cut by the Thaya river runs right through the park, making for dramatic landscapes and interesting rock formations. Cycling and hiking are the two most popular activities for visitors, and the park is happy to offer informative guided walking tours.