1.   The ice field extends well inland from the lagoon into an area virtually inaccessible except by foot across rugged terrain.

2.   Their territory is inaccessible except by foot or beast.

3.   Vast tracts of the country are still inaccessible except by helicopter, officials said.

4.   The crash site was a jungle-choked area that is virtually inaccessible except by air.

5.   The crashed site is a remote, jungle-shrouded area virtually inaccessible except by air.