Stud farm linked to the former Royal Stud Farm, founded in 1748 by King João V, with the aim of producing good quality horses. After two and a half centuries ensuring the evolution and preservation of the breed, the Stud Farm of Alter is the oldest Portuguese stud farm and, in the world, the one that has operated in the same location for the longest time: Coutada do Arneiro in Alter do Chão.

Covered infrastructure with medium-sized swimming pool, changing rooms, jumping pool and supervised children's pool. The Alter do Chão Swimming Club is based here.

Space with a wide variety of plant species and children's playground. It is located in the center of the village of Alter do Chão and is decorated with a small water fountain.

Located on a cliff 400 meters above sea level, Alter Pedroso is an ancient village, six kilometers from the municipal seat (Alter do Chão) and around twenty from the city of Portalegre. Of particular note are the remains of the old castle, the church with baroque remains and the houses featuring popular and well-preserved architecture. Nearby there is a tourist hunting area. Also, noteworthy is the Talefe or Alter Pedroso natural viewpoint.

Ribeira de Seda originates in Serra de São Mamede and crosses the municipalities of Portalegre and Crato, entering Alter do Chão and then flowing into the Maranhão dam, in Avis.

Several medieval portals stand out along this street.

Location with picnic area and children's playground. Of note is an open-air exhibition area, an amphitheater and a traditional games field. Typical buildings, including a water scoop wheel, boilers, pergolas and viewpoints.

This viewpoint offers wonderful views over the natural landscape of the parish of Seda.

Urban fence built by King Afonso Henriques, in 1160, over traces of Roman occupation. It maintains three keeps, with the irregular termination of the structure being evident.

Built in 1617, it underwent modifications in the 18th century. On the main facade there are three windows, the sides being blind and the central one open, with a grille, topped by a panel of blue and white tiles depicting Saint Anthony. The pediment is cut out, with two small bell towers on the sides. The interior is of a nave, with the main altar in marble.