The old city consists mainly of the Loreto, Caballeros, Mayor and Sant Josep streets and some adjacent roads. This neighbourhood is integrated into the urban fabric of the 16th and 17th centuries and still preserves an interesting set of houses built at the end of the 18th century and over the course of the 19th century, representing the wealth and the bourgeoisie that was born out of the raisin phenomenon.

The castle known as Castell de Dénia, located upon a gentle hill in the heart of the city, completes the physiognomy and defines the topography of this municipality with origins dating back to classical antiquity.

From the fortress you can see the city area, the Montgó Natural Park all the way until the Cabo de Sant Antoni Marine Reserve and the Gulf of Valencia.

When visiting the Castle of Dénia, you can see:

• The access portal to the castle, known as El Portal de la Vila (12th century). It has a barrel vault and pointed arches in the Almohad style on the outside.
• La Torre Roja (15th century), which is a tower built in local reddish sandstone.
• La Torre del Cuerpo de Guardia, a tower with Arab origins which was remodelled during the 16th and 17th centuries. It was used, together with an underground room, to house guards.
• La Torre del Consejo (15th century), which is without a doubt the most important part of the walled perimeter of the medieval town. It served as the meeting place for the old Town Council. Inside, the Gothic room with a ribbed vault stands out.
• La Vila Vieja (14th century), an open-air area with remains of medieval houses belonging to the Vila that was founded at the beginning of the 14th century by order of King Jaime II.
• El Baluarte, which is a defensive bastion dating from the 18th century. It was the largest and most easily defendable bastion of the whole castle, controlling the entrance to Vila Vieja through its main portal.
• El Portal del Baluarte which, dating back to the Islamic period, connected the Al-bacar with the Islamic citadel. It has 3 arches from different periods, with the Arab horseshoe arch standing out.
• The “Governor's Palace”, the Archaeological Museum, an enclosure with an area of 190 m² dating back to the 17th century that was part of the Palace of the Marquises of Dénia complex.
• Paved road (14th century). The main street of the Vila Vieja that connected it with the upper enclosure, the Palace.
• La Punta del Diamante (17th century), a defensive bastion built in the Renaissance style, with an angular shape.
• La Torre del Gallinero, built in pumice stone from Roman times.
• La Torre del Medio, or Middle Tower (11th century). It has an Islamic rectangular structure, rounded off in subsequent Renaissance interventions. Interesting elbow access door, built in the Almoravid style (12th century).
• Portal de los Reyes or Portal de los Socorros. It was one of the historical entrances to the Vila Vieja (the eastern access), which provided connection to the port and the Arrabal del Mar shoreline neighbourhood.
• Interpretation Centre.