Little did we know that basalt can create so many landforms.. Penghu indeed opens our eyes. Except for Flower Island formed from porphyrite and quartz porphyrite, the Penghu archipelago consists of volcanic islands of basalt magma. Erosion and sea alluvium over the years have shaped the currently magnificent geological landscape.

Tungpan Island, named to describe its resemblance to barrel plates, is composed of walls of basalt columns. These spectacular formations have given the island its reputation as "Penghu's Yellowstone Park," especially the sea-eroded plain, known as the "Lotus Terrace," on the southwest side of the island. Meanwhile Chishan Island and Tingkou Island are basalt preserves. The rows of packed hexagonal basalt columns that form a high sea cliff and unusual geological basalt scenery are so majestic. Such unique landscape has caused Tingkou Island to be called "Micro Kueilin".

The northern coast of Yuanpei Island and a basalt column on the eastern side is known as the "Brush Pen and Inkstone" because of the similarities in shape. The scenery is unique.

Giant Lion Scenic Area on Chimei Island features a giant stone lion sitting atop a cliff. Lungcheng Gulf on the north side of the island is named for its winding formation resembling a dragon.

The Whale Cave on Hsiaomen Island, Chimen in Shimen Hsiang and basalt columns in Tayeh are all worth a visit, too. The Penghu basalt in all its grandeur, like engravers’ elaborate workmanship,, deserves appreciation and praise.