This is the 15014th most frequent German word.
schöner
"Schöner" means "more beautiful" in English.
Here, "schöner" is used as an attributive adjective describing the noun "Tag" (day), and agrees in gender, case, and number with the noun.
Das ist ein schöner Tag.
This is a beautiful day.
Here, "schöner" is used in the genitive plural form as an attributive adjective describing the noun "Sehenswürdigkeiten" (sights).
Berlin hat viele schöner Sehenswürdigkeiten.
Berlin has many beautiful sights.
Here, "schöner" is used as a comparative adjective in the predicate, comparing the current area "Gegend" to another one.