Kyholm is located just outside of Stavns Fjord itself, north of Besser Rev. It spans 30 acres. The name translates to 'cow island', and has historically been used for cattle grazing. Between 1709 and 1711 Kyholm was a quarantine station during the plague epidemic. A plague house was constructed, and merchant ships had to dock at Kyholm in 40 days to prevent infection with the islanders. During the English Wars between 1801 and 1815, a series of sconces were built and a garrison set up on the island. A quarantine station was established again between 1831 and 1859, this time to prevent cholera. A hospital and a cemetery was built. Ships wanting to go to Danish harbours had to visit Kyholm first. This stopped in 1857 and in 1859 the quarantine station was shut down and the buildings torn down. The cemetery remains on the island, and many tomb stones are still visible. The island is today under the same protection as the other islands in and around Stavns Fjord. Brattingsborg Manor owns the island.