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Check off the four corners

Arizona, Utah, Colorado and New Mexico are not simply the only four American states that meet at a single point, but they also host the US's greatest concentration of national parks.

This is the place to come for that classic scene of the lonely desert road extending to the horizon. On your way, take in such sights as the Monument Valley and the mysterious remains of centuries­old civilizations in Colorado's Mesa Verde.

Find beauty in the desert

With many miles of excellent roads, a self­drive trip in Namibia makes total sense. Plan a route  north from capital Windhoek to wildlife­rich Etosha National Park, before crossing Damaraland to reach the Skeleton Coast. The most impressive desert views are in the Namib­Naukluft National Park to the south. At Sossusvlei, the landscape takes on the quality of a surrealist painting.

Cross half a continent

The 1,761­mile­long Stuart Highway runs north to south through Australia's Red Centre. It is not a road where every turn shows new wonders; the reward of this trip comes in the gradual change in your surroundings, from red soils in Australia's outback to the tropical(ÈÈ´øµÄ) leaves of the Indian Ocean coast.

Take the high road

Among all the crashing of continental plates that raised up the Canadian Rockies, a 144­mile route was left more or less clear at their centre. The Ice fields Parkway now passes through this amazing scenery; with the access it brings to icy lakes, waterfalls and ice fields, the section between Banff and Jasper has a good claim to being the most scenic in the world.

1£®Where can you experience ancient civilizations?

A£®In Australia's Red Centre.

B£®In the Canadian Rockies.

C£®In Colorado's Mesa Verde.

D£®In the Namib£­Naukluft National Park.

2£®What can you do on a self­drive trip in Namibia?

A£®Explore the Monument Valley.

B£®Enjoy the striking desert views.

C£®Save some endangered wildlife.

D£®Go through the largest national park.

3£®What can you infer about the trips mentioned in the text?

A£®They provide the amazing road adventures.

B£®They offer new wonders across the world.

C£®They are for those who love various national parks.

D£®They are intended to raise environmental awareness.