The word "巫峡" is formed by combining "巫", referring to the Wushan area or its mythological associations, with "峡", meaning gorge, to designate the specific geographic entity known as Wu Gorge.
Word Definition - 巫峡
wū xiáWuxia Gorge on the Changjiang or Yangtze, the middle of the Three Gorges 三峽|三峡[sān xiá]