The earliest occupation of this site possibly dates back to pre-Roman, Roman or Muslim times, and it was later rebuilt in 1139. It has an irregular oval layout, with a square keep, three levels, straight arrow slits and a pointed arch doorway.

It is believed that this castle was built before the establishment of the nation, during the reign of Alfonso IX of León. Later, King Dinis recovered much of that region, ordering restoration and expansion works on its fortresses. King Manuel I granted a new charter to the town, leading to further restoration works. Currently, two square towers remain, one of the entrance gates bearing the royal crown and the coat of arms of King Manuel. Nothing remains of the wall that surrounded the town.

This fortification was built in the 12th and 13th centuries and later expanded by King Dinis. During the Manueline period, some alterations were made, of which the portal that gave access to the drawbridge remains. It also preserves the alcazaba with its pentagonal-based keep, the Torre das Cinco Quinas (Tower of the Five Corners), protected by machicolations and turrets, and the ring of walls that surrounds the town. Of particular note are the thickness and height of the alcazaba's curtain walls and the existence of the barbican.

A castle of probable Muslim construction, whose oldest written document mentioning it dates from the reign of King Sancho I, who ordered repairs to be made to the castle. Later, King Manuel I benefited from restoration works, marked by the insertion of the Manueline coat of arms on the castle walls. The alcazaba remains, with machicolations and loopholes protecting the entrance to the enclosure, and inside, a cistern. In the center of the citadel is the keep, with a square plan and a single floor. The walled enclosure, with two gates flanked by towers, completely surrounds the town.

It is located between the municipalities of Ovar and Espinho, and is also known as Barrinha de Esmoriz. It is a medium-sized coastal lagoon, rare to find along the northern coast of Portugal. Furthermore, it constitutes an area of ​​ecological, scenic and recreational interest, possessing great ornithological and plant diversity.

A recently constructed building with modern architecture, featuring spaces designated for specific activities such as a cosmotheque, a tempus room with a cinema screen six times larger than standard size, a spatium room (planetarium-type), an exhibition gallery, a multipurpose room, a cafeteria, and a shop.

A very pleasant and well-maintained space, with various sports equipment, a playground, and very nice wooded areas.

This is a prime location for Thalassotherapy, using iodine from seawater, with a highly trained clinical team. The large, heated seawater pool caters not only to treatment but also to leisure and swimming practice.

A very busy fair, one of the best known in the northern region, which is already part of the weekly routines of people from the Aveiro district and the cities of Porto and Gaia.

A large space surrounded by nature with 12 outdoor and 3 indoor courts, including 8 clay courts, 5 outdoor and 3 indoor courts, 4 artificial turf and 3 synthetic flooring, 2 squash courts, group classrooms, a weight room, jacuzzi, Turkish bath, sauna and relaxation area.