Longcheng lies on the southeastern coast of Qimei Island (historically known as Nantian Island) and is a broad wave-cut platform formed over millennia by the erosion of basalt columnar joints by ocean waves. The word cheng (埕) in Hokkien refers to an open courtyard or floor space, and the name Longcheng — “Dragon’s Court” — captures its appearance: at low tide, an expanse of dark basalt reef is exposed under the sun, and the joint lines trace out an interlocking pattern of hexagonal and pentagonal column faces that, viewed from a distance, looks like the overlapping scales of a dragon stretching from land into the sea. Geologically, the basalt on Qimei Island belongs to extrusive rock laid down roughly 10 to 15 million years ago during the volcanic activity that formed the Penghu archipelago. Lava flows cooled and contracted slowly, producing the characteristic columnar jointing, and high-energy waves from the South China Sea gradually planed and polished the columns into the horizontally expansive platform visible today. Visitors to Qimei tend to be geology enthusiasts, photographers, and day-trippers; Longcheng is typically listed alongside the Heart-shaped Stone Weir and Little Taiwan as the three notable sites on the island.
Highlights
At low tide the main platform can extend across several thousand square metres, its surface covered with a regular grid of polygonal joint lines. Viewed from above, the basalt resembles a precisely cut jigsaw puzzle in deep grey — orderly yet carrying the irregular beauty of nature. The seaward edge of the platform, worn by years of lateral wave action, forms sheer erosional cliff faces. When large waves hit, seawater shoots up through the joint crevices in surging spouts that photographers often wait for; even in calm conditions, the low-frequency vibration of waves meeting rock can be felt distinctly through the soles of your shoes.
Tidal pools are scattered across the platform, each capturing a small volume of seawater at ebb tide and supporting a rich intertidal ecosystem. Look closely and you will find limpets (Cellana) clinging to the rock surface and grazing on algae, brittle stars sheltering under pebbles, and hermit crabs scurrying through the crevices. Bands of algae colour the rock surface in gradations — yellower-green toward the landward side, deeper brown nearer the sea — providing a clear real-world illustration of intertidal zonation. The southern sea waters around Qimei carry higher wave energy than those around Penghu’s main island, which is why the erosion at Longcheng is on a more dramatic scale than comparable formations elsewhere in the archipelago.
In the hour before sunset, westward light casts long shadows along the joint lines, and the basalt’s dark blue-grey tone contrasts sharply with the golden-orange light, giving the platform a strong sense of depth. Note that day-trip ferries from Qimei typically depart by 3:00–3:30 PM, so if you want to see the evening light, check in advance whether overnight accommodation is available on the island or whether any operator offers a later sailing.
Getting There and Nearby Attractions
Qimei Island has no bus service, and all access is entirely by sea. The main departure point is Magong First Fishing Harbour, where several ferry operators run day-trip sailings to Qimei; in peak season there may be multiple departures per day, with a journey time of about 80 minutes. Alternatively, you can depart from Budai Fishing Harbour in Chiayi County on the Taiwan mainland — a journey of about 50–60 minutes — which saves the intermediate transfer to Magong and suits travellers setting out from southwestern Taiwan. For timetables and fares, check announcements from the Penghu County Government Transportation and Tourism Bureau or contact operators directly. In peak season (June–August) seats are in high demand, so book 3–5 days ahead. If you also plan to visit Wang-an Island, see our outer-island ferry page for the Wang-an–Qimei inter-island connection.
After arriving at Qimei Pier, scooter rental is available nearby (around NT$300–400 per day) and is the most common and flexible way to get around the island. Longcheng is about 2.5 km from the pier, roughly a 7-minute ride. The recommended day-trip circuit is: Pier → Little Taiwan → Longcheng → Qimei Lighthouse → Wangfu Rock → Heart-shaped Stone Weir → back to Pier; following this order avoids doubling back, and 3–4 hours is enough to take in all of Qimei’s main sights. Longcheng itself is flat and has no slopes, making it accessible to all ages. However, the basalt surface becomes slippery when wet, so wear non-slip shoes or water shoes, stay alert to wave conditions and tidal timing, and keep well clear of the edge of the wave-cut cliff face.