Motena Cave Natural Monument (Georgian: მოთენას მღვიმე) is a karst cave located 0.7 km to the south from village First Balda (Pirveli Baldi [1][2] ) in Martvili Municipality in Samegrelo-Zemo Svaneti region of Georgia, 437 meters above sea level.

[3] Cave is located on left bank of Abasha river.

In Middle Ages Motena cave was integral part of the now lost fortress.

[4] The total length of the cave is 75 m. It has two storey with big hall on each connected by a narrow passage.

[7] The inhabitants of the cave are spiders and insects, namely Trachysphaera, Heteromurus, Lepidocyrtus, Tomocerus, Sphaerozetes, Chamobates, Porobelba, Adaugammarus, Parasitus, Pergamasus, Xiphocaridinella,[8] Troglocaridicola, Scutariella, and Tectocepheus.