Sinap Castle is a medieval Armenian fortification in Çamlıyayla ilçe (district) of Mersin Province in southern Turkey.

The fort of Sinap is located approximately six kilometers northeast of Lampron on the gentle slope of a partially forested agricultural valley.

This three-story high structure has a simple rectangular plan with solid cylindrical towers at each corner.

[2] The lower floor, which is covered by a partially collapsed pointed vault, has no openings except for one door in the west wall.

Its walls are opened by nine beautifully designed casemates with embrasured loopholes, two windows, and an apse (?)