Located in Wai'an Village, Xiyu Township, Penghu County, the Yu-Won Island Lighthouse is at a high place of vast vision, so it is also called "Xiyu Lighthouse". The government listed it as a national historical site. Constructed in the reign of Qing Emperor Guangxu Dynasty, it is the earliest western-style lighthouse constructed in Taiwan and Penghu area. The Yu-Won Island Lighthouse is a western-style lighthouse reconstructed after Xiyu lighthouse was demolished. The outward appearance of Yu-Won Island lighthouse is a bright white columnar building, tapering from bottom to top, standing above the granite terrain, and surrounded by stone walls. The internal structure is extending upwards along spiral stairs. In addition, what should be noted is that nearby the Yu-Won Island lighthouse is a military site which the tourist should pay much attention to the shooting angle when taking photos. After enter the white wall of Yu-Won Island Lighthouse, you will find that the western-style lighthouse, the buildings, the stairs, and the green grasses formed a strong exotic style. The white building neighboring to the sea more highlights the blue color of the ocean. In front of the view where the sea and the blue sky connect, the snow white building and the soft white clouds interweave, you will feel confused where the boundary between the sky and the sea is. Entering the lighthouse, you can try to observe the seacoast view and the fishing boats from the window, it is very interesting. Besides, near the lighthouse there is a cactus garden, which looks very funny and lovely. The Yu-Won Island Lighthouse is also kind to provide the tourists places to stop their transport tools.