Facile, adjective: without depth; superficial.

Source: http://www.dictionary.com/browse/facile

We encountered at the end of the first paragraph of chapter 3 of Quicksand. The author uses the word to describe how the campus at Naxos was beautiful, but only in appearance.

“On one side of the long, white, hot sand road that split the
flat green, there was a little shade, for it was bordered with
trees. Helga Crane walked there so that the sun could not so
easily get at her. As she went slowly across the empty campus
she was conscious of a vague tenderness for the scene spread
out before her. It was so incredibly lovely, so appealing, and so
facile. The trees in their spring beauty sent through her restive
mind a sharp thrill of pleasure.”