Side-Turkey.

If you have looked out over Green Canyon and wondered how a lake this calm and this impossibly green ended up between the Taurus peaks, the answer is more interesting than the postcards suggest. This is not a wild mountain gorge carved by a river over millions of years. It is something younger, quieter and very deliberate: the reservoir of a dam. Knowing the real story makes the boat trip far more rewarding, so here is what is actually going on out on that emerald water.

What Green Canyon Really Is

Green Canyon, or Yesil Kanyon in Turkish, is the lake that formed behind the Oymapinar Dam, in the Manavgat district of Antalya province. The dam sits on the Manavgat River, deep in the folds of the Taurus Mountains. When the dam was completed and the valley filled, the rising water reached up into the surrounding gorges and turned them into long, still arms of lake. That flooded canyon is what visitors cruise through today.

The colour is the first thing everyone notices. The water reads as a deep, mineral green rather than blue, a tone that shifts through the day as the light moves across the steep, pine-covered slopes that rise straight out of the surface. Because it is a reservoir rather than an open river, the lake is remarkably calm, which is exactly why boat tours work so well here.

The Dam Behind the Lake

The Oymapinar Dam is a genuine piece of engineering history. It is a concrete arch dam standing 185 metres high from the riverbed, built between 1977 and 1984 and operated by Turkey's State Hydraulic Works (DSI). Its hydroelectric plant has a capacity of around 540 megawatts, making it an important contributor to the region's power supply. So when you glide across that quiet green surface, you are floating on water that is also doing real work generating electricity for the coast.

This matters for visitors in a practical way too. Because the lake is a managed reservoir and a source of fresh water, the setting stays clean, protected and free of the speedboat chaos you find on the open sea. It is a slower, more contemplative kind of day out.

Don't Confuse It With Koprulu Canyon

This is the single most common mix-up, so it is worth being clear. Green Canyon and Koprulu Canyon are two completely different places. Koprulu Canyon is a separate national park, declared back in 1973, on the Kopru River, and it is famous for white-water rafting through a dramatic river gorge. It even takes its name from a Roman-era stone bridge. Green Canyon, by contrast, is the calm dam lake on the Manavgat River, and the experience here is a relaxed scenic boat cruise, not an adrenaline ride. If you want rafting, that is Koprulu. If you want serene emerald water and panoramic mountain views, that is Green Canyon.

How the Day Works

A typical visit is a full-day boat excursion. We arrange hotel pick-up, drive you up into the mountains to the boarding point on the lake, and you spend the day cruising the canyon arms with stops along the way. Boats here are usually large and stable, with shaded lower decks and open upper decks for the panoramic views. There is normally time to pause and swim in the cool, clear water during the day.

Quick Facts

• Duration: Full day — exact times confirmed at booking.
• Pick-up: Hotel pick-up from Side, Manavgat and nearby resorts; time confirmed at booking.
• Includes: Return transfer, boat cruise on the lake, and a swim stop (lunch typically included — confirmed at booking).
• Excludes: Personal extras, drinks not specified in the package, tips.
• Family Friendly: Yes — calm water and a relaxed pace suit all ages.
• Best Season: Spring through autumn for warm, settled weather.
• Difficulty: Easy — no physical effort required.

Related Excursions

• Tours & excursions from Side
• Things to do in Antalya
• Excursions from Alanya
• Day trips from Belek
• Excursions from Kemer
• More travel guides on our blog

Frequently Asked Questions

Is Green Canyon natural or man-made?

It is a man-made reservoir. The lake formed when the Oymapinar Dam was built on the Manavgat River and the valley filled with water in the 1980s.

Where exactly is Green Canyon?

It is in the Manavgat district of Antalya province, set among the Taurus Mountains on the Manavgat River.

Why is the water so green?

The deep mineral-green colour comes from the lake's depth and the surrounding rock and forest reflecting in the still reservoir water.

Is Green Canyon the same as Koprulu Canyon?

No. Koprulu Canyon is a separate national park known for rafting on the Kopru River. Green Canyon is a calm dam lake for scenic boat cruises.

Can you swim in Green Canyon?

There is normally a swim stop during the cruise, where you can enjoy the cool, clear lake water.

Is it suitable for children and older travellers?

Yes. The calm water and relaxed pace make it comfortable for families and all ages.

When is the best time to visit?

From spring to autumn, when the weather is warm and settled and the mountain scenery is at its best.

What should I bring?

Swimwear, a towel, sun protection, a light layer for the breeze on deck and a camera for the views. For exact details, confirm at booking.

Ready to see the emerald lake for yourself? Book directly with Murat Atalay and the side-turkey.com team via WhatsApp or info@side-turkey.com. Booking direct means no agency or OTA commission, our best-price guarantee and honest local advice straight from the people running the trip.