dizzying
diz-zy-ing
adjective
Causing a sensation of spinning, unsteadiness, or overwhelming speed or height.
"The dizzying heights of the skyscraper were breathtaking."
Thesaurus
Synonyms: airheaded, dizzy, featherbrained, lightheaded, light-headed, frivolous, empty-headed, giddy, silly, vertiginous, ill, woozy