The remnants of the medieval temple known as "Ai-Andriy" are located on the southeast slope of the Karlich hill in the southern part of the Mountainous Crimea. This is one of the eastern spurs of Mount Demerdzhi, situated on the right bank of the Ulu-Uzen river valley, at the source of Ai-Andriy, approximately 7 km from the Black Sea and at an altitude of about 500 m above sea level, 1.6 km southwest of the village of General'skoye. The monument consists of the ruins of a single-nave church with a narthex, built over a spring, the water of which flows from a portal under the southeast wall of the church. Nearby, the remains of a small settlement have been found.

There are no direct historical sources about the complex. The first documented mentions appeared, likely, after the annexation of Crimea to the Russian Empire. In particular, it is mentioned in the works of academicians E. E. Kёler and P. I. Keppen as a local landmark, a "Greek church" over the spring along the road between the villages of Ulu-Uzen and Demerdzhi. Travelers noted its relatively good preservation.

In 1896, the ruins were inspected by the chairman of the Taurida Scientific Archive Commission, A. I. Markevich, who soon published a brief but detailed description of them. By the end of the 19th century, the narthex of the church was heavily damaged, but the naos was better preserved. A "majestic" entrance and corner columns were mentioned, including two "whole" ones, one of which had a capital, as well as "another door" in the "northern" wall. Beneath the building is a "vault built on lime," from which the Kuru-Uzen river flows.

The monument is mentioned in the "Report on the Christian Population," compiled in 1901 by A. L. Berthier-Delagarde. In 1903, the first photographs of the monument were taken, stored in the Central Museum of Taurida. In 1911, geologist P. A. Dvoychenko visited the site and took several photographs. In 1912, A. I. Markevich reported the collapse of the vault in the ruins of the church in 1907.

In April 1913, assistant to the Alushta city elder I. D. Ivanov recorded the partial destruction of the church by the residents of the village of Ulu-Uzen, who were trying to redirect the spring waters to their lands. The Taurida vice-governor issued an order for the preservation of the site, and in May of the same year, the Yalta district police officer took the ruins under protection. The elder and the village representative provided guarantees for the preservation of the ruins.

A guidebook from 1929 notes the deterioration of the site: "A few years ago, there was still an entrance with columns made of limestone tuff, but now the church is heavily destroyed, and only two walls remain, the southern and eastern, while the others have turned into a pile of stones."

In 1956, the Mountain team led by O. I. Dombrovsky conducted the first preliminary studies on the Ai-Andriy church. The ruins were cleared, described, and photographed, and a schematic plan of the structure was made. The preservation of the walls exceeded 2 m in places, but overall the monument was significantly more destroyed than at the beginning of the 20th century.

During the work, remnants of the wall separating the narthex and naos, columns in the corners of the naos, pilasters in the narthex, two niches, and an altar elevation were identified. Fragments of architectural details, ceramic vessels, and roofing tiles from the 11th-12th centuries were also found. The church is dated to the 11th-12th centuries. South of the church, remnants of earth dwellings and a burial ground were discovered.

In the popular science book by K. K. Kogonashvili and O. A. Makhneva, the monument is mentioned as a medieval settlement and monastery of Ai-Andriy. In 1969, the site was registered as an architectural and archaeological monument. From the late 19th century and into the early 21st century, the Ai-Andriy spring and church have been mentioned as a place of worship for St. Andrew the First-Called.

In 2005, the Mountain-Crimean expedition led by A. V. Lysenko conducted an examination of the complex, gathering historical-archival information and topographic surveying. The site occupies a slope area with two terrace-like platforms, one of which is possibly of natural origin. On the upper platform, there are two water sources, above one of which are the remains of the church. The building is heavily damaged, but the catchment gallery beneath the floor has been preserved.

By 2018, the ground in the building had been leveled. The southeast wall and part of the apse masonry have been rebuilt with distortions. The new masonry is dry-laid, up to 0.65 m high. A wooden cross has been installed on the outer side of the northwest wall. Remnants of cultural layers have been traced over an area of at least 0.036 ha.

The main part of the complex is the medieval church with a catchment gallery. The church belongs to the type of small single-apsed churches with a rectangular plan, built on a terrace-like platform. Its dimensions in plan are approximately 4.5×10.0 m, with an internal space of 3.0×8.3 m. The height could exceed 5-6 m. The entrance was located at the southern corner of the building. Beneath the church is the catchment gallery of the spring, from which water flows under the southwestern wall of the structure.

The walls of the church are made of local sandstone, with three-layer masonry. Architectural details are made of limestone tuff. The internal space is divided into three parts: the altar, naos, and narthex. The naos is rectangular, with columns with capitals in its corners. In the southeast wall of the naos, there is a window opening. The narthex is separated by a wall, with pilasters in its corners. The roof was possibly gabled.

Some features of the structure allow it to be associated with southern coastal churches of the 14th century. The earliest artifacts, fragments of tiles and amphorae, date from the 8th to the 10th centuries. The majority of the material is dated to the 14th-15th centuries.