Sanxiantai is an area on the coast of Taitung, Taiwan, renowned for its distinctive offshore island connected to the mainland by an iconic eight-arch cross-sea bridge. The name 'Sanxiantai' translates to 'Terrace of the Three Immortals,' reflecting local legends that three Chinese deities once stopped here. This rugged landscape is characterized by a combination of unique geological formations, including a beach composed of black volcanic rock and pebbles, and the marine erosional terrain has resulted in dramatic landforms. The island itself is a geological marvel with various types of rock formations shaped by the elements over time. Designated as a nature reserve, it supports a diverse range of sea-life and is an important habitat for a variety of bird species. The area is popular among tourists for its natural beauty, sunrise viewings, and the rich biodiversity that can be observed along its walking trails. It serves as an excellent spot for photography, ecological observation, and understanding of coastal geology. Due to the strong waves and winds that have shaped its landscape, Sanxiantai presents a breathtaking piece of the East Coast National Scenic Area.