Ed Byrne and Andy Parsons brave temperatures as low as 50 below to drive across Siberia's infamous Road of Bones.
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July 8, 2012
2. Ho Chi Minh Trail
Sue Perkins and Liza Tarbuck drive the legendary Ho Chi Minh Trail, a network of dangerous roads hacked through mountains and jungles of Laos and Vietnam.
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July 15, 2012
3. Ethiopia
Hugh Dennis and David Baddiel drive Ethiopia's bone shaking roads to reach Askum, home of the Ark of the Covenant.