One of the old names for the Korean island of Ulleungdo in Korean historical documents was "Sambongdo" (三峰島 - 삼봉도), which means "Island of Three Peaks." Ulleungdo's three prominent peaks were mentioned numerous times in Korean historical texts. Though some nationalistic Korean historians claim that Sambongdo was referring to Liancourt Rocks (Takeshima - Dokdo), Korea's own historical texts, and, apparently, even the symbol for Korea's Ulleung County (울릉군) seem to contradict that claim.
Notice that the Ulleung County symbol to the left shows three peaks against against a background of red. The county's Web site, HERE, describes the symbol as follows:
The oval shape of the outer edge of the symbol represents the sun rising over the East Sea (Sea of Japan). With Ulleungdo's Seongin Peak in the center, the shape of the mountains is shown with a design of three triangular peaks that represent Ulleung's unyielding spirit.
가장 자리를 둘러싼 타원은 동해에 떠오르는 태양을 상징하며 산의 형상은 울릉도의 성인봉을 중심으로 울릉의 굳굳한 기상을 삼각형태의 대칭구조로 2분하여 도안 되었습니다.
The Korean seems a little awkward to me, so if someone has a different translation, please let me know. For example, I assumed 굳굳한 meant 꿋꿋한. Also, the expression 2분하여 seems awkward to me.
Again, the three peaks of Ulleungdo were mentioned numerous times in Korea's historical documents.
Thanks, Chaamiey, for pointing out the symbol.