Haedong Yonggung Temple & The Seaside Views, Busan, Korea. This seaside temple is touted as one of the most picturesque temples in Korea. It's one of the only temples to sit directly overlooking the coast.
Sanbang Grotto on Jeju Island, Korea is a must visit. The temples at the foot of the mountain are beautiful and the small hike is easy enough. For great views and beautiful Buddhist temples on Jeju Island, check out Sanbang Mountain.
Guinsa Buddhist Temple in Danyang, Korea is one of the most interesting and unique temples in South Korea. The temple requires a continuous hike to truly see every bit of the 50 buildings that are on the mountain grounds but it is truly worth it.