Finike Suluin Cave

Suluin Cave is an underwater cave located within the boundaries of the Finike district in Antalya Province, on the southern coast of Türkiye in the Mediterranean Region. It is situated approximately one kilometer west of the Finike district center, along the Finike-Demre highway. The cave is also known locally as “İncirli Cave” or “Gök Mağara.” Noted for its natural morphology and structural features identified through research, this cave is regarded as one of Türkiye’s significant karstic and marine-connected cave systems.

^{Suluin Cave (}Finike District Governorship, Republic of Türkiye⁾

One of the most striking physical features of the cave is its entrance, which is approximately 80 meters wide. This dimension renders the cave unique not only within Antalya but also at the national and continental Asian levels. The full length and depth of the cave have not yet been precisely determined. Various research dives conducted inside the cave have measured its depth up to 122 meters, but its ultimate boundaries remain unexplored. This highlights the structural complexity and natural accessibility challenges of Suluin Cave.

Observations within the interior sections of the cave have revealed the presence of various natural formations, including travertine pools, stalactites, and limestone deposits on the walls. One of these interior areas is a spacious chamber located at a depth of approximately 45 meters. This chamber is among the most prominent volumetric voids identified during cave investigations.

Hydrologically, the internal water system of the cave exhibits two distinct characteristics simultaneously. Freshwater is encountered near the entrance, while salinity increases with depth, exhibiting characteristics of seawater. This dual structure supports scientific hypotheses suggesting a subterranean connection between the cave and the Mediterranean Sea. The water temperature remains consistently around 13–14 °C throughout the year. Additionally, the cave water is acidic, and a smell similar to hydrogen sulfide is detectable in deeper sections. This indicates the presence of specific biogeochemical processes within the cave environment and the occurrence of gas accumulation in certain areas.

^{Suluin Cave (}Finike District Governorship, Republic of Türkiye⁾

One of the most significant scientific diving activities related to Suluin Cave was carried out on 27 August 1995. A submarine research team from the United States reached a depth of 122 meters within the cave. However, during this dive, two divers lost their lives. Following the incident, access to the cave was closed to the public and amateur divers, and it is now accessible only to professional teams engaged in scientific research or operating under special permits. This underscores the extreme hazards associated with accessing the cave.

^{Suluin Cave (}Finike District Governorship, Republic of Türkiye⁾

Archaeological evidence within the cave reveals traces of human activity from past periods. In particular, fragments of pottery and bone remains have been found in certain sections. These discoveries suggest that the cave once existed in a terrestrial environment and was used by humans, either temporarily or permanently. In this context, the cave is not only a geological and hydrological feature but also a site of archaeological potential.

Suluin Cave is currently recognized as one of the important natural formations of the Finike district. Although access to the cave is prohibited outside of scientific research, the site is protected at both local and national levels, and relevant authorities have implemented various measures to preserve its natural integrity.