Riddle

A path between high natural masses; remove the first letter to get a path between man-made masses.

Choose an answer

A.A canyon
B.A gorge
C.A pass
D.A valley
Hint: It's a 2-word phrase with 7 letters, starting with "A".

Answer

A valley

Why this is the answer

A 'valley' runs between mountains, and removing its first letter leaves 'alley,' a narrow passage between buildings.

This riddle is filed under Hard/Difficult Riddles and rated Medium.