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As the world reopens to travelers, the planet's national parks offer a whole lot of peace and quiet landscapes. Here, let's find some national parks which are safe and possible to travel to.
·Croatia: Mljet National Park
Generations of vacationers have heard the song of Dubrovnik, the “Pearl of the Adriatic”. When you are bored with the tourists crowding the Old Town, particularly in the peak summer season, choose the national park located only 15 miles offshore. Blanketed in a pine forest, Mljet Island offers activities like cycling， hiking，kayaking（皮划艇） and swimming in the famous saltwater lakes.
·France: Mercantour National Park
Travel.30 miles from the Riviera and you can discover one of France's last wild areas, a place of great biodiversity and varied landscapes. There's a red-rock valley, the grass filled with wildflowers, villages located on sheer rock cliffs, etc. Did we mention the prehistoric rock art? A guided hike through the “Valley of Wonders” shows Bronze Age petroglyphs（岩画）carved in stone.
·Iceland: Vatnajökull National Park
Why go for one volcano when you can explore two? Vatnajökull National Park isn't just a park. This World Heritage Site is formed by volcanic and glacial（冰川的）activities in southeastern Iceland, and covers 14 percent of the country.
·Ireland: Killarney National Park
Created in 1932 as Ireland's first national park, Killarney is a 25,425-acre area of mountains, lakes, and woodlands. It's a UNESCO Biosphere Reserve because of its diversity of habitat and species. The park is home to Carrauntoohil, the country's highest mountain at 1,038.6 meters. And the forest, filled with oaks, yews, and lichens, presents Ireland's native woodland.
21. What can tourists do on Mljet Island?
A.Play water sports. B.Visit the Old Town.
C.Observe wildflowers. D.Enjoy beautiful songs.
22. Which park do you want to visit if you are a fan of rock arts?
A.Mljet National Park. B.Killarney National Park.
C.Mercantour National Park. D.Vatnajökull National Park.
23. What's special about Killarney National Park?
A.It is a World Heritage Site. B. It is formed by glacial activities.
C. It owns Ireland's highest mountain. D. It gets its name from deep valleys.
