🔄 Updated 21 Jun 2026
Fort Phra Chulachomklao isn't a replica or a modern rebuild. It's a real gun fort that King Rama V ordered built to defend the mouth of the Chao Phraya, and it was actually used to fire on French warships during the Paknam crisis of 1893. Once you walk around and see the guns in their pits, the warship sitting at the water's edge and the King Rama V monument facing out to sea, it's clear why this spot is such an important landmark for the Royal Thai Navy.
Today the Navy runs the whole area as the Phra Chulachomklao Fort Naval Historical Park, split into main zones: the King Rama V monument, the disappearing-guns display, the HTMS Maeklong warship museum, an open-air gun park and a mangrove nature trail. Walking the whole thing at an unhurried pace takes about 2–3 hours.
The disappearing guns — still in their original pits
The thing everyone photographs is the disappearing gun — an Armstrong cannon mounted in a firing pit. When it isn't in use the barrel drops down into the pit until it's almost hidden, then rises to fire. That kept it out of the enemy's sight and made it hard to fire back on. The Thai name "seua mob" ("crouching tiger") comes from exactly that motion. The fort has several of them aimed out toward the river mouth, and they're still in their original positions so you can walk right up to them.
These are the same guns used to fire on the French warships during the 1893 Paknam incident. Walk around a firing pit and follow the line of the barrel out toward the river, and you'll get a sense of why this point was such a key checkpoint for defending the sea route into Bangkok.
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HTMS Maeklong — walk aboard a real warship
On the other side of the fort is the HTMS Maeklong warship museum, a sloop the Navy hauled up on land at the water's edge so visitors can climb aboard. You can actually walk the deck and look through the engine room, the control room and the officers' quarters. This ship served for more than 60 years, making it one of the longest-serving warships in the Royal Thai Navy before it was decommissioned and turned into a museum.
Tip
Some of the ladders aboard are steep and the passageways are narrow, so comfortable shoes you can move easily in will serve you better. The sun gets strong mid-morning, so it's best to board early in the day or in the late afternoon.
The 1893 Paknam crisis that happened right here
On 13 July 1893, two French warships — the Inconstant and the Comète — tried to force their way past the sandbar at the mouth of the Chao Phraya. Fort Phra Chulachomklao and Fort Phi Suea Samut on the opposite bank, together with a group of Thai warships, opened fire to stop them in what became known as the Paknam Incident. Both sides took damage, but the French ships pushed through and anchored right in front of their legation in Bangkok.
It ended with Siam having to sign a treaty on 3 October 1893, ceding the territory on the left bank of the Mekong to France, including Luang Prabang, Vientiane and Champasak. It was a hard lesson in defending the nation's independence, and it's the reason this fort has been preserved to tell the story to later generations.
- King Rama V monument — set facing out toward the river mouth, this is where people pay respects and take their first photos on arrival
- Disappearing-gun pits — Armstrong guns in their real firing positions, close enough to walk right up to
- HTMS Maeklong — a warship on land that you can climb aboard and explore inside
- Open-air gun park — old cannons and military hardware displayed across the grounds
The mangrove trail and river-mouth views
After you've seen the guns and the ship, there's a wooden nature boardwalk that runs out through the mangroves toward the water. It's shadier than the gun zone, with birds and fiddler crabs to watch along the way, and it opens out onto a view of the Chao Phraya flowing into the Gulf of Thailand. Plenty of people end up liking this spot for photos and a sea breeze even more than the fort itself.
Mangrove boardwalk
A shaded walk among mangrove trees and mudflat wildlife, ending at a river-mouth viewpoint.
Riverside terrace
Sit and catch the breeze while cargo ships come and go from the bay — a good afternoon rest stop.
Hours, entry fee and getting there
- Hours — roughly 8:30am–4:30pm (open daily; hours can change, so check before you go)
- Entry — free, including boarding HTMS Maeklong
- Location — Laem Fa Pha sub-district, Phra Samut Chedi, Samut Prakan, at the end of Suksawat Road (Highway 303) by the mouth of the Chao Phraya
- By car — from Bangkok take Suksawat Road all the way down toward Phra Pradaeng–Phra Samut Chedi; there's parking inside the fort
- By bicycle — the grounds are spread out, and bike rentals are available for riding around the fort and into the mangroves
When to go
The sun here is strong because it's open ground by the water. Going early after opening or in the late afternoon makes for a more comfortable walk — bring a hat and water. Visit on a weekday and there'll be fewer people, so it's easy to wander and take photos.
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