Phra Sumen Fort
One of two surviving forts from the fourteen that ringed Bangkok in 1783, in a riverside park near Khao San.
Updated 12 October 2026
When Rama I moved the capital to Bangkok in 1782 he had the new city walled, with fourteen forts around the perimeter connected by a rampart and a canal moat. The city outgrew the walls within a century and most were demolished; two forts survive. Phra Sumen is the larger, an octagonal whitewashed structure of three tiers with cannon embrasures, built in 1783 at the point where the Banglamphu canal meets the Chao Phraya, and named for Mount Meru. It now stands in Santichaiprakan Park, a small riverside green with a lawn, a walking path along the water and a view across to Thonburi - which is what most people use it for, since the fort interior is not open. In the evening the park fills with joggers, aerobics classes and people sitting by the river, and it is a short walk from Khao San Road, which makes it a common quiet stop. Mahakan Fort, the other survivor, is near the Golden Mount.
The main sights
- The octagonal fort - three tiers with cannon embrasures, built 1783.
- The park - riverside lawn and path around the base.
- The city wall story - two survivors of the original fourteen forts.
- The river view - across to Thonburi from the bank.
When to go
November to February; late afternoon and evening, when the park fills and the light on the river is best. Half an hour covers it.
Before you go
The fort interior is not open - it is viewed from outside only. The park is small. It is a stop rather than a destination, five minutes from Khao San.
Nearby
Khao San Road is a short walk south; the Phra Athit pier and river boats are alongside.
Key facts
Source: Wikidata, item Q13017018, read on 18 October 2026.
What to pack for Phra Sumen Fort
Chosen from what this place is for. Tap a kit for the full checklist.
- Comfortable walking shoes - Sightseeing means kilometres of pavement and cobbles daily. Find on Amazon
- A slim anti-theft daypack - Zips that close properly; keep it in front in crowds and on transit. Find on Amazon
- A refillable water bottle - Many cities have public fountains; save money and plastic. Find on Amazon
- A light layer + compact umbrella - For museum air-con and a sudden shower. Find on Amazon
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