Penghu residents have long relied on the sea for their livelihoods and often erect stone towers on shoreline hills. The rock towers serve as both windbreaks and talismans, taming the wind and warding off evil, ensuring peace and prosperity. In the village of Nei’an, a pair of stone towers, Dagong and Dapo, the so-called "husband and wife” towers, stand roughly 100 meters apart. In the sea west of Nei'an’s north harbor, a submerged reef, Hailai Reef, and a headland to the north, Horseshoe Crab Tail, aim like arrows at Nei'an Village. Consequently, residents often suffered catastrophes. As a countermeasure, young villagers built two towers in 1843, linking them with a hundred-meter wall. The configuration suggested a husband and wife holding hands, guarding the village against malign forces and ocean flooding. 

Tower construction followed the principle of harmonizing yin and yang to suppress evil. The "husband" tower represents yang, or male energy, and the "wife" tower female, or yin energy. The "husband" faces west. The square, six-story structure is topped with a red ceramic jar and stands at 12.3 meters tall, about 40 feet, making it Penghu County's tallest stone tower. The “wife” is a one-story conical structure with an upside-down green ceramic urn placed on top.

There’s a columnar basalt outcrop on the coast near the towers. The columns stand two meters above the ground, and the joints are clear and differentiated. When viewed from the sea, the outcrop once resembled the Buddhist deity Guanyin’s head. Eighteen basalt pillars flanked the formation, nine on each side, evoking Buddhism’s Eighteen Arhats, monks said to have attained enlightenment. Unfortunately, much stone has been hauled away from the site, and it no longer appears as it once did.