観覧料(かんらんりょう)

Japanese picks the fee word by the kind of place, and the words are not interchangeable:

Types

• 観覧料(かんらんりょう): places you go to look at something — a garden, an observation deck, a zoo
• 拝観料(はいかんりょう): temples and shrines
• 入館料(にゅうかんりょう): buildings whose name ends in 〜館(かん) — museums, galleries, halls
• 入場料(にゅうじょうりょう): grounds, venues, and events

Common collocations

• 観覧料(かんらんりょう)無料(むりょう): admission free
• 観覧料(かんらんりょう)込(こ)み: viewing fee included
• 観覧料(かんらんりょう)を払(はら)う: to pay the viewing fee