This is the 9507th most frequent Korean word.
경북북동산지를
"경북북동산지를" refers to "the northeastern mountainous region of Gyeongbuk (Gyeongsangbuk-do)."
In this sentence, '경북북동산지를' refers to a specific geographical location, the mountain area in the northeastern part of Gyeongbuk province. The word is used as the object of the verb 'to travel'.
경북북동산지를 여행하는 계획을 세웠습니다.
We made plans to travel to the mountain area in the northeast of Gyeongbuk.
Here, '경북북동산지는' serves as the topic of the sentence, highlighting its renown for natural beauty. It is marked with the topic particle '는'.
경북북동산지는 아름다운 자연 경관으로 유명합니다.
The mountain area in the northeast of Gyeongbuk is famous for its beautiful natural scenery.
In this context, '경북북동산지에서' indicates the location where the action of hiking took place, using the location particle '에서'.