This version of the Arena is a new location first introduced in Monster Hunter Rise.
Source: http://monsterhunter.wikia.com/wiki/Monster_Hunter_Wiki
Monster BGM Playlist: https://www.youtube.com/playlist?list=PLGYC3ko9W17UmjzeBQXHpHF2JNI9qOt_m
Location BGM Playlist: https://www.youtube.com/playlist?list=PLGYC3ko9W17U3yKWKPG-fR1KgSEkyMBf1
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