The housing and office building of Caves Hill is located at one end of the urban centre of Moja, at the confluence of Bonavista and Llarg streets. It is a house with a ground floor and a main floor, which occupies an entire block. The main façade has a symmetrical composition, with three openings for each floor. The most interesting elements of the construction are the framing of the openings, the stepped crowning and the eaves as well as the use of exposed brick. The architectural language is Modernism. The building was most likely built in 1918.

The Cooperative Winery of Moja is located on the outskirts of Moja, on the road that goes up to the Olèrdola castle. It consists of two transversal and a perpendicular nave, connected by brick atriums. This last nave is covered with a two-sided roof on wooden trusses that support the side walls. Of the two transversal industrial units, the one which is further away, destined for the unloading dock and the pressing room, is covered with a roof on one side, inclined towards the neighbouring unit, on wooden beams and tins and a tiled floor. The other transversal one is also covered with a gable roof on wooden trusses that rest on very low arches on pillars of cruciform section; the arches and pillars are made of brick. On the outside, the two primitive units are made of irregular stone with exposed brick openings; the two access doors to the unit covered on two sides are protected by a double canopy. In the space where the main ship that was to house the vats was supposed to go, only some were installed underground, separated by a central corridor made with parabolic arches. The walls of the main unit (built later) have an irregular stone plinth, with floor-level ventilation windows, and the rest of the walls are plastered; the seven vertical windows of the main façade (which are repeated in the main of the primitive units), the lowered arched door with a canopy with a flat brick vault at the top and the powerful cornice of the gable roof stand out; the south side façade has a series of three-pierced windows. Above the main door there is a white ceramic panel with a dark blue frame with the inscription ‘Sindicat Agrícola de Moja’, in red and blue letters. At the top of the façade, another sign bears the date 1921. On January 1, 1921, the Agricultural Union of Moja was founded, promoted by the village master, Alejo Bertran, the Union of Vintners of Catalonia and the technicians of the Wine Station of Vilafranca del Penedès, and by Josep Mestre Comas, who was its first president. It was made up of peasants and some average owners. In Moja there was also the Union of Farmers of Sant Jaume de Moja. On February 19 of the same year, the viticulture section was instituted, some land was bought to build the winery and Cèsar Martinell was entrusted with the project; the contractor was Pau Llopart, from Moja. The initial project provided for two parallel ships in a north-south direction, and two ships perpendicular to the first in a west-east direction; of these, however, only one was built, the façade of which is the main one, facing the old town. Due to economic problems, at first only the two transversal units were built in a north-south direction and the underground vats of the west-east perpendicular ship. In 1929, this area was not yet finished. In 1930, a fence was built around the unloading dock. Four underground vats were built in one of the transversal units, and more vats were added to the basement of the perpendicular one; between 1953 and 1959, surface tubs were added; in 1983, tubs were installed on the surface where the second perpendicular unit had to go.