The Best Things to Do in The Mekong River: Ho Chi Minh City to Siem Reap

Boats start rafting up along the Cai Be canal junction as early as 5:30am, hulls piled with dragon fruit, jackfruit and green coconuts, each vendor's pole-mounted sample telling you what's for sale before you're close enough to ask the price.

This is the most photographed floating market on the route, but it earns the top spot because it is also the least sanitized for tourists: locals genuinely provision here, and the narrow-boat detours into the surrounding canals reveal brick kilns, coconut candy workshops and stilt houses that most itineraries only glimpse from the main channel.

This 1895 merchant house, blending French colonial columns with Chinese lacquered woodwork, is famous as the setting for Marguerite Duras's novel The Lover, and it still feels lived-in rather than museum-frozen.

Entry runs roughly VND 20,000-30,000 (about USD 1), and the caretakers are happy to point out the altar room and the riverfront balcony where Duras is said to have first met her lover in the 1920s. Pair it with a walk through Sa Dec's flower nurseries, which supply much of the Mekong Delta's cut-flower trade.

Chau Doc is the last real Vietnamese town before the Cambodian border, and it has a frontier energy: Cham fishing villages on stilts, a floating fish farm you can walk straight into, and Sam Mountain rising abruptly out of the flat delta a few kilometers outside town.

The climb or motorbike-taxi ride to the top takes about 20-30 minutes and rewards you with a sweeping view over the rice fields toward Cambodia. At the base, Ba Chua Xu Temple draws pilgrims year-round for its statue of the Lady of the Realm.

There is something quietly thrilling about clearing customs on the water rather than at an airport counter. The border post at Vinh Xuong on the Vietnamese side and Kaam Samnor on the Cambodian side handles passport stamping directly from the boat deck, and the whole process usually takes 45-90 minutes depending on how many vessels are queued.

Once through, the river widens noticeably and the architecture along the banks shifts almost immediately, from Vietnamese tile roofs to the wooden stilt houses and Buddhist wats that mark the start of Cambodia.

Phnom Penh sits exactly where the Tonle Sap River meets the Mekong, and the Royal Palace complex, with its glittering Silver Pagoda floor tiled in over 5,000 silver blocks, is the obvious daytime highlight. Entry runs about USD 10, and modest dress covering shoulders and knees is enforced at the gate.

But the city's weight comes from Tuol Sleng Genocide Museum (entry roughly USD 6, audio guide included) and the Choeung Ek Killing Fields memorial about 15km outside the center (also around USD 6). Set aside a full morning for both; rushing them does a disservice to what they document.

Balance the heaviness with the Central Market's art deco dome and the riverside promenade at dusk, where families gather for badminton and grilled corn as the sun drops behind the water.

Angkor Ban is one of the few riverside villages that survived the Khmer Rouge years largely intact, and its century-old wooden stilt houses, raised on carved posts against the annual floods, are protected as a heritage site.

Walking the dirt lanes between houses in the late afternoon, with schoolchildren cycling past and women laying out rice to dry, gives a far more honest sense of rural Cambodian life than any curated cultural show. There's no entry fee; a small donation to the village pagoda is appreciated.

The climb to Wat Hanchey, a working monastery perched on a ridge above the river, takes about 10-15 minutes up a shaded staircase lined with saffron-robed monks going about their afternoon routines.

From the top, the Mekong stretches wide and brown in both directions, dotted with fishing boats and sandbanks that shift with the season. Brick foundations near the modern temple date back to the pre-Angkorian period, a reminder that Khmer civilization was building in stone along this river centuries before Angkor Wat existed.

Oudong served as Cambodia's royal capital for close to 250 years before Phnom Penh took over in the 1860s, and the ridge above the town is still lined with the whitewashed stupas of past kings and queens.

The site was badly damaged during the Khmer Rouge period and has been rebuilt since, which means the stupas feel less ancient and more like an active site of memory and restoration. Climbing to the top takes about 20 minutes up a stepped path shaded by frangipani trees, and the summit view stretches across flooded rice fields toward the Mekong.

This is the destination the whole river journey is building toward, and it delivers. Most cruise itineraries transfer guests from the river route to Siem Reap by road once low-season water levels make direct passage across the Tonle Sap impractical; the drive takes roughly 5-6 hours depending on the route and season.

A one-day Angkor Archaeological Park pass costs around USD 37 (as of late 2024) and covers Angkor Wat, the Bayon's carved stone faces at Angkor Thom, and the tree-swallowed ruins of Ta Prohm. Arrive at the western entrance by 5am to claim a spot at the reflecting pool before the sunrise crowd thickens.

In town, Pub Street's chaos is fun for one evening, but Phare, the Cambodian Circus, on the eastern edge of Siem Reap is the better use of a night: a nightly acrobatic and theatrical performance staged by graduates of a social arts school in Battambang.