Jinnamgwan Hall (National Treasure) is located at the site of the Jeolla Province naval base during the Joseon dynasty. At that time, it was a watchtower called Jimhaeru, where Admiral Yi Sun-sin commanded his forces during the Imjin War (1592-1598). The original building burned down near the end of the war, and Admiral Yi Sun-sin's successor, Yi Si-eon, constructed Jinnamgwan Hall, a large gaeksa (government officer guesthouse) at the site in 1599.

Jinnamgwan Hall is a single-story gable-roofed building with 15 kan (traditional Korean measurement between two pillars) on the front and 5 kan on the sides. It is the largest single-story goverment building from the Joseon dynasty in the region. At the hall entrance is a small museum outlining the history of Jinnamgwan and the Imjin War, and the famous Yeosu Stone Statue (Jeollanam-do Tangible Cultural Asset) is located within the precincts of the hall. Nearby attractions include Jasan Park, Odongdo Island, Dolsan Bridge, Chungminsa Shrine, and Manseongni Beach.