a forest-park, arboretum

national park

parkway

park that is designated by nation and maintained by prefecture (in Japan, 都(と)道(どう)府(ふ)県(けん) (todōfuken)) or other local government; quasi-national park

(offensive, Internet slang) a man whose age is greater than about thirty or forty who lives in one's child room and with one's parent(s).

(figuratively) being carefree and unaware of an imminent danger