Ranked by popularity — off the island to the real Fujian
Ordered by how popular they are, with an honest note on which is best done on a tour, which you can train to yourself, which is half a day or a full day, and whether it fits a single spare day.
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If you leave the island for just one place, make it the tulou. These are the giant earthen homes of the Hakka, built as round (and square) fortresses three to five storeys high, with rammed-earth walls a metre thick, each one housing a whole clan as a single community — architecture that has been a World Heritage site since 2008 and exists nowhere else on earth. The iconic photo spot is the Tianluokeng (田螺坑) cluster, nicknamed 'four dishes and a soup' because, seen from the hillside, it looks like four round buildings around one square in the middle.
The catch — and the thing to plan for — is that they're deep in the mountains, 2.5–3.5 hours from Xiamen, on public transport with several changes and shaky timetables. So this is the one trip on the list we genuinely suggest doing on a day tour: hotel pick-up, entry tickets and a guide in one vehicle, out in the morning and back at night, nothing to figure out.
This is the easiest day trip on the list, because the high-speed train from Xiamen to Quanzhou takes only about 30 minutes. Quanzhou was the largest port on earth in the Song and Yuan dynasties, and was inscribed as a World Heritage site in 2021 as the start of the maritime Silk Road. It's often called 'a museum of the world's religions', because a Buddhist temple, a mosque and Chinese shrines all stand in one city.
The highlights are Kaiyuan Temple (开元寺), a Tang-dynasty Buddhist temple from 686 with China's tallest pair of stone pagodas; Qingjing Mosque (清净寺) from 1009, modelled on the prayer hall in Damascus; and a wander down West Street (西街), which keeps its old layout, stopping for local snacks and Minnan noodles. Honestly, Quanzhou is the most rewarding culture trip out of Xiamen, and an easy there-and-back.
If the tulou are Nanjing's stern side, Yunshuiyao is its gentle one — an old village with a clear stream running through the middle, more than ten thousand-year-old banyan trees lined along the banks, and long old stone paths following the water. It's been the set for several Chinese films. The mood is slow: a place to sip tea by the stream and watch an old farmer cross a wooden bridge.
Because Yunshuiyao sits in the same zone as the Nanjing tulou clusters, people like to pair the two on one trip — walk the earthen fortresses in the morning, then stroll the streamside under the banyans in the afternoon. Most tulou tours from Xiamen already include Yunshuiyao; or, for a slower day, pick a tour focused on Yunshuiyao plus old-town Zhangzhou. There are also a few tulou inside the village itself to step into.
Not every trip has to be a World Heritage site — if you've already done Quanzhou and want somewhere new and less busy, Zhangzhou (漳州), Xiamen's neighbour to the southwest, is a pleasant alternative, about 30–40 minutes away by high-speed train. The popular bit is the old-town district full of qilou (騎樓) arcade shophouses with covered walkways in the southern-Chinese style, an old pedestrian street, old temples and Minnan snack shops.
Honestly, Zhangzhou hasn't gone fully touristy yet — it's cheaper and far less crowded than Quanzhou. It suits anyone after a quiet southern-Chinese old town to wander and snack through for half a day, or you can use Zhangzhou as a stop on the way to the tulou and Yunshuiyao, since they're on the same route — which is why some tours pair Yunshuiyao with old-town Zhangzhou in one day.