Wichian Chodok Fort

Wichian Chodok Fort (ป้อมวิเชียรโชฎก) is a brick fortification built in 1828 on the orders of King Rama III to defend the mouth of the Tha Chin River at Samut Sakhon. Construction was overseen by Phraya Chodueak Ratchasetthi (Thongchin Krairoek), a senior Chinese-Thai official, after Siamese-Vietnamese tensions over the Chao Anouvong rebellion in Vientiane left the king wary of a seaborne attack on the kingdom’s river mouths. A French diplomatic account from 1687 records an earlier defensive position at the same river mouth, suggesting the site’s strategic value was recognised long before the Rama III fort was raised.

What remains today

The fort was built of brick and mortar, with firing positions along the parapet walls rather than a gatehouse; each wall opening held a cannon aimed to cover vessels approaching on the Tha Chin. Those original cannons — cast with the British royal cypher “G R” and the foundry mark “BACON” — have since been moved to stand in front of the City Pillar Shrine and Sala Klang, a short walk from the fort itself. Only three of the original walls remain: north, south and the river-facing west wall. The east wall was demolished at some point to open a road through, and what’s left today shows decades of weathering, with graffiti and encroachment documented in local press accounts.

Insider Tip: Combine the fort with the City Pillar Shrine a few minutes’ walk away — that’s where the original cannons actually stand now, not at the fort itself, and most visitors miss the connection.

Watch out: There’s no English-language signage and no staff on hand — read up before you go, or the ruined walls won’t mean much on their own.

Practical details

The fort sits about 200 metres from the provincial hall in Maha Chai subdistrict, an easy pairing with the Mahachai Market and municipal port, the old town and the Tha Chin riverfront. Entry is free, with no formal facilities on site. For mangroves and birdlife on the same side of town, the Ao Mahachai Mangrove Forest Study Centre is a short drive south. View on Google Maps.