overland       
adjective, adverb uk/ˈəʊ.və.lænd/ us/ˈoʊ.vɚ.lænd/
 (旅行)横跨陆地(的);从陆路(的)
(of travel) across the land in a vehicle, on foot, or on a horse; not by sea or air
  an overland trip across Australia 横穿澳大利亚的陆路旅行 
 We travelled overland. 我们开车走陆路。