The Turtle Island is the only active volcanic island in Taiwan, as its name suggests, the island is shaped like a turtle. Rising to 398 m above sea level and occupying 2.7 km2, the island is a Yilan landmark and holds an important place in the hearts of the Yilan people.

The Beiguan (literally the North Pass) takes its name from its location at the northern tip of the Yilan Plain. In 1819, the Qing court took advantage of the natural terrain and built Beiguan to create a pass to manage the flow of people and goods between Yilan and Taipei.
Beguan sits against a cuesta and faces the coastline. Standing on the rocky coast, visitors can enjoy a majestic view of rolling waves and Turtle Island.

The Wushi Harbor (literally “black rock port”) is named after the port’s black and dark-gray coastal shale reefs. Thanks to the steep topography, river channels in the area maintained sufficient water depth to make the Wushi Harbor an important gateway for Yilan in the past. In 1826, the Qing court designated the Port of Wushi a major harbo. However, starting in 1878, the Wushi Harbor and surrounding river channels gradually became blocked by sediment and their use declined as a result.In 2006, the Yilan County Government designated the former site of the Wushi Harbor a cultural landscape, and in 2010 the Lanyang Museum opened next to the site of the Port. Today’s old Wushi Harbor is an ecological park offering natural and cultural attractions that are worth a visit.

Nanfang'ao used to be an island off the coast of Yilan, but as sand drifts continued to accumulate, the island eventually became joined to the mainland. Nanfang'ao coast is an erosional coast, and Pirate's Cove on the southeastern side of the tied island exhibits geological features such as sea caves, sea cliffs, and rocky debris slides.