The Grotta della Trinità o dell'Eternità is located on the northwest of Serra that joins Casarano and Ruffano. The cave is privately owned and damaged by human intervention. It has a depth of more than 30 m, an irregularly triangular plan, a high vault and wide arc mouth facing west that light the surroundings especially during the afternoon. Some walls in proximity of the cave’s mouth are related to recent adjustments. ...

The Grotta Montani, located on the Spigolizzi hill, is characterized by two adjacent niches, one is completely closed by stones and the other is open through a small and low tunnel. It is a karst complex, which opens on an ancient shoreline, originally more vast and articulated than how it is presented today. It has a central room, from which four long and narrow tunnels diffuse. Found inside the cave were numerous objects, in flint and local limestone, used by the Neanderthal Man associated with the remains of elephants, rhinoceroses, hyenas, and wild boars. ...

The Grotta Febbraro, identified originally as Speculizzi III, at 72 meters above sea level, is constituted by a single corridor provided with an avangrotta or a cavern, for a total length of about 15 meters, a width of 3 meters and a height of 2 meters. The actual opening is slightly interned from its original location in a paleo cliff formed during the Upper Cretaceous period about 66 million years ago. The Grotta Marzo, identified as Speculizzi IV, situated at 74 meters above sea level, presents a rather small opening, protected by abundant vegetation. Some remains were found inside it such as: post-medieval pottery, animal bones that are relatively recent, and the remains of a dry stone wall that separates the main corridor, approximately 12 meters long, from a second passage ...

Protected by the thick vegetation, along the canal of Fano on the eastern ridge, the crypt is almost invisible at a quick glance. Having small dimensions (2.70 × 3.20 m), probably intended for a small group of Byzantine monks, the place of worship entirely dug in the bedrock consists of two environments: a cell, where the participants could occupy the two seats formed along the side walls during the religious celebrations, and a separated apse from the cell by a partition stone that reaches the ceiling flanked by two windows. At the center of the first cell, a small pit perhaps contained the remains of one of these monks. Little remained of the painted decoration from which a depiction of Saint Pantaleone is recognizable.   ...

The Cipolliane caves are of three divisions that open onto the cliff facing east, along the path between the Novaglie coast and on the area of the Ciolo canal. The caves, now about 30 meters above sea level, was once touched by the sea, as evidenced by the presence of shells, scallops and bivalve mollusks that cover the surface of the caves, caused by the erosive power of the ramming sea of Terziario. ...