Located approximately 25 km from Silifke district of Mersin, the Heaven and Hell Sinkholes are two large natural pits formed by the collapse of karst topography; the Heaven Sinkhole can be reached by descending 400 steps and contains historical church ruins at its base, Müzekart holders can enter for free.
The Heaven and Hell Sinkholes, located approximately 2 km north of Narlıkuyu, which is part of Silifke district of Mersin, and 5 km west of Kızkalesi, consist of two large natural pits formed by the collapse of karst topography over centuries. Both offer different experiences to visitors with their rocky, wide, and deep structures: while the Hell Sinkhole can be easily viewed from the observation deck due to its proximity to the entrance, reaching the Heaven Sinkhole requires descending approximately 400 steps. Although the vast majority of visitors agree that this descent is tiring, they say that the coolness and visual impact inside are worth it.
When you descend to the bottom of the Heaven Sinkhole, you are greeted by the ruins of a historical church; from there, it is possible to proceed into the depths of the cave. Approximately 300 meters southwest of the sinkhole is the Asthma Cave, about 200 meters long; this cave, notable for its stalactites, stalagmites, and various cave formations, deserves a separate visit. For those who do not wish to climb the stairs again on the way out of the Heaven Sinkhole, an elevator option is available; this detail is particularly appreciated by visitors after a tiring descent. There are also restrooms and a cafe in the entrance area.
Müzekart holders can enter the area for free. If you do not have your card yet, you can obtain it before entry; visitors state that the Müzekart, purchased for 100 TL, is valid in more than one place and thus pays for itself in a short time. With the arrangements made by the Ministry of Culture and Tourism in recent years, the area has gained a much more accessible and well-maintained appearance.
Related discoveries: Historical Sites, Mersin historical sites, Karaekşi Nature Park.
Guide's Note
When to Visit?
The most suitable period for a visit is April-June and September-November. During these months, the weather is mild, the scorching effect of the sun is much less felt, and visitor density significantly decreases compared to the summer months. In July-August, outdoor areas can be quite hot; since the inside of the cave remains cool in all seasons, a summer visit is also possible, but avoiding midday hours will make your visit easier in terms of both heat and crowds.
How to Get There?
The sinkholes are located on the road that branches north from the 20th kilometer of the Silifke-Mersin highway (D400). If you are going by private car, it is sufficient to drive approximately 2 km north from Narlıkuyu, or approximately 5 km west from Kızkalesi. It is about 80 km from Mersin city center.
Those wishing to come by public transport can find minibuses from Mersin or Silifke to Narlıkuyu; from Narlıkuyu, it is possible to reach the sinkholes by taxi. Since many points in the region, such as Kızkalesi, Narlıkuyu Mosaics, and Asthma Cave, are close to each other, planning a day tour by car is a logical choice in terms of both time and cost.
How Much Time Should You Allocate?
1.5 to 2.5 hours is sufficient just to visit the sinkholes. While the Hell Sinkhole can be quickly viewed from the observation deck, descending and ascending the Heaven Sinkhole, even with the elevator, takes at least 45-60 minutes. If you add the nearby Asthma Cave to your itinerary, allow an additional half hour.
When combined with Kızkalesi, Narlıkuyu Mosaic Museum, and Silifke Castle, the region transforms into a full-day itinerary. If you plan to stay overnight, hotel options are available in Kızkalesi or Silifke.
Suggested Itinerary
To efficiently explore the region, you can try the following order: First, visit the Narlıkuyu Mosaic Museum (small but impressive Roman-era mosaics), then proceed to the sinkholes. After viewing the Hell Sinkhole from the observation deck, descend into the Heaven Sinkhole; after visiting the church ruins at the bottom, ascend by elevator. From there, visit the Asthma Cave, located 300 meters southwest. Finishing the day by the sea in Kızkalesi is an ideal conclusion.
Photo Spots
The observation deck at the edge of the Hell Sinkhole offers the best angle to frame the entire sinkhole; a wide-angle lens works well here. Shots taken looking up from the middle of the stairs while descending into the Heaven Sinkhole best reflect the depth and scale of the sinkhole. The church ruins inside the cave create a dramatic atmosphere during hours when natural light filters through the sinkhole; morning light is much more advantageous for this section. The stalactites and stalagmites in the Asthma Cave offer great opportunities for close-up photography; don't forget to bring a flashlight.
Things to Know Before Visiting
Physical condition: There are approximately 400 steps to descend to the Heaven Sinkhole. This descent can be challenging for those with knee or joint problems; although an elevator is available for ascent, the entire descent is done by stairs.
Footwear choice: Choose closed-toe, non-slip shoes for the potentially slippery stone steps. Descending with sandals or high heels is risky.
Müzekart: Entry is free with Müzekart. If you don't have a card, you can obtain it at the entrance or in advance; since Kızkalesi and surrounding museums are also covered by Müzekart in the region, the card quickly pays for itself.
Cave temperature: No matter how hot it is outside, the inside of the cave remains cool; it is recommended to bring a light cardigan or a light jacket.
What to Eat Nearby?
There is a small cafe in the entrance area; useful for snacks and drinks. For a more comprehensive meal, Narlıkuyu village is known for its fish restaurants offering fresh seafood; stuffed mussels and grilled fish are a must-try here. If you go to Kızkalesi, the restaurants lined along the coast offer good options for both sea views and local Mediterranean cuisine.
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