Dong Cam Dam, Phu Yen: A Traveler's Guide

What it is

Dong Cam Dam ("Dap Dong Cam") is a massive stone-and-concrete weir spanning the Da Rang River about 30 km west of Tuy Hoa city in Phu Yen province. Built by the French colonial administration between 1924 and 1932, it stretches roughly 680 meters across the river — one of the longest irrigation dams in Southeast Asia at the time of completion. The structure channels water into a canal system that feeds rice paddies across the Tuy Hoa plain, turning what was once drought-prone land into one of the most productive rice areas in the central coast.

The dam survived bombing during the American War, was repaired multiple times, and still functions today. It's not a ruin — it's a working piece of infrastructure that happens to be nearly a century old.

Why travelers go

Honestly, most don't. Dong Cam sits in that category of places that reward the curious rather than the Instagram crowd. The reasons to visit:

• The engineering itself. Walking across the dam's crest gives you a sense of scale that photos don't capture. Water thundering through the spillways during rainy season is genuinely impressive.
• The setting. The Da Rang River here is wide and flanked by green hills. In dry season, the upstream side becomes a calm lake reflecting the surrounding mountains. In wet season, the overflow creates a curtain of white water.
• Quiet. You'll likely share the place with local fishermen and maybe a couple of Vietnamese tourists. No ticket booths, no souvenir stalls.
• Gateway to the Phu Yen highlands. If you're riding a motorbike between the coast and the central highlands (중부 고원 / 中部高原 / 中部高原), Dong Cam makes a natural stop before the road climbs toward Dak Lak province.

Best time to visit

Two distinct experiences depending on timing:

• September to November (rainy season): The dam overflows and the water is dramatic — brown, fast, loud. The surrounding hills are deep green. This is the photogenic season, but roads can be slippery.
• March to June (dry season): The reservoir behind the dam is calm and reflective. Less dramatic but more peaceful. Easier for walking along the dam crest and exploring the canal system.

Avoid December–January if possible; Phu Yen catches the tail end of northeast monsoon rains, and flooding can make access roads difficult.

How to get there

Dong Cam is in Dong Cam commune, Phu Hoa district, about 30 km west of Tuy Hoa.

From Tuy Hoa: Take QL29 (National Road 29) heading west toward the highlands. The dam is signposted — look for the turn after about 25 km. Total ride is 30–40 minutes by motorbike.

From Quy Nhon: About 180 km south along QL1A then west on QL29. A half-day ride if you're not stopping.

From Dak Lak (Buon Ma Thuot): Take QL29 east down from the highlands. The dam is roughly 130 km from Buon Ma Thuot, about 3 hours by motorbike given the mountain roads.

No direct public bus goes to the dam itself. You can catch a bus to Phu Hoa town (frequent minibuses from Tuy Hoa, 15,000–20,000 VND) and then hire a xe om for the last 5 km.

Photo by Sk4ter bol on Pexels

What to do

Walk the dam

The crest is open to pedestrians and motorbikes. Walking end to end takes about 15 minutes and gives views both upstream (reservoir) and downstream (the Da Rang continuing toward the coast). The French-era stonework is visible in the original sections — look for the date markers carved into the pillars.

Explore the canal head

On the south bank, the main irrigation canal begins. The first few hundred meters are lined with old tamarind trees, and local kids swim in the canal during hot afternoons. A short walk along the canal gives a sense of how the whole Tuy Hoa plain gets its water.

Ride the riverside road

The road along the north bank of the Da Rang between the dam and Tuy Hoa passes through rice paddies and small villages. It's flat, quiet, and scenic — a good 30 km ride if you have a bicycle or motorbike.

Combine with Nhan Tower

Nhan Tower (Thap Nhan), a Cham-era tower on a hill overlooking Tuy Hoa, is about 25 km east. Easy to pair both in a half-day loop from the city.

Where to eat

There's no restaurant at the dam itself — just a couple of drink stalls selling tra da (iced tea) and snacks. For a proper meal:

• Phu Hoa town (5 km east): Several com binh dan (rice plate) spots along the main road. Expect to pay 30,000–45,000 VND per plate.
• Tuy Hoa city: The coastal city has better options. Try "[banh canh](/posts/banh-canh-vietnam (베트남 / 越南 / ベトナム)-thick-noodle-soup)" he (crab noodle soup) — Phu Yen's signature dish. A bowl runs 35,000–50,000 VND at market stalls near Tuy Hoa central market.
• If you're heading toward Dak Lak, the highland road has com tam stops in the small towns along QL29 once you start climbing.

Where to stay

Nothing at the dam. Your options:

• Tuy Hoa (30 km east): Budget hotels along Tran Hung Dao street from 250,000–400,000 VND/night. A few mid-range places near the beach at 500,000–800,000 VND.
• Phu Hoa town: One or two nha nghi (guesthouses) if you're stuck, around 200,000 VND. Basic but clean enough.
• Buon Ma Thuot (130 km west): If you're coming from the highlands, better to stay there and make the dam a day trip or a stop en route to the coast.

Photo by Tường Chopper on Pexels

Practical tips

• Free entry. No ticket, no gate, no opening hours. You can visit anytime, though daylight is obviously better.
• Bring water and sun protection. There's almost no shade on the dam itself.
• Motorbike rental in Tuy Hoa runs 120,000–150,000 VND/day for a Honda Wave.
• Drone note: No explicit ban, but this is working infrastructure. Use common sense and don't fly directly over the spillways or machinery.
• The dam area has phone signal (Viettel, Mobifone) but no wifi.

Common mistakes

• Expecting a tourist attraction. This is not Ha Long Bay or Ninh Binh (닌빈 / 宁平 / ニンビン). There are no boats, no guides, no cafes with views. Adjust expectations accordingly.
• Visiting midday in summer. The concrete radiates heat. Early morning or late afternoon is far more comfortable.
• Skipping it entirely on the Tuy Hoa–Buon Ma Thuot route. The QL29 highland pass is one of the most underrated rides in Vietnam. Dong Cam makes a natural first or last stop depending on your direction. Don't just blast through.

Final note

Dong Cam Dam won't make anyone's top-ten list, and that's precisely why it's worth a stop. It's a piece of living history in a province that most travelers skip between Da Nang and Nha Trang (냐짱 / 芽庄 / ニャチャン). If you're riding the coast or crossing between the central highlands and the sea, give it an hour. You'll have the place mostly to yourself.