One of the main attractions of Mangistau region is the unique monument of religious architecture, the underground mosque 'Shakpak-Ata'. The mosque is located on the Tyubkaragan Peninsula, more than 20 kilometers north-east of the city of Fort-Shevchenko, and is considered the oldest architectural monument in Western Kazakhstan. The Shakpak-Ata underground mosque was cut down in a mountain chalk cliff. It is known that the Sufis who sheltered in this cave practiced healing magic. They helped people who came here to get rid of diseases. To do this, they left the sick person in the cave for the night. According to archaeologists, the mosque was built in the 9th-10th centuries. Its name is given in the honor of Sufi Shakpak-ata, who lived here with his disciples during the enemy raids. In the last years of his life he was a recluse and no longer left his underground abode.