You searched for: “anablepophobia
anablepophobia (s) (noun), anablepophobias (pl)
An excessive apprehensiveness of looking up at high places: Generally those who have anablepophobias avoid looking up at the tops of tall buildings in cities and at the tops of mountains while in the country.

Anyone with an anablepophobia can become overwhelmingly uncomfortable and distressful, sometimes having symptoms associated with panic attacks; such as, palpitations, sweating, dizziness, and difficulty in breathing.