
The Castillo de San Julián, also known as Saint Julian's Fort, is a fort in Cartagena, Spain. It was built between the 18th and 19th centuries, incorporating a tower which had been built by the British in 1706. The fort remains intact today, but it is in a rather dilapidated state.

El Fadrí, also known as the Fadri Tower, is a standing alone bell-tower of the Gothic procathedral Castelló Cathedral of Castellón de la Plana, Spain. It was built in the 15th century, commencing in 1440 and completed in 1604. It is an octagonal building, about 58 metres (190 ft) high. It was built in Valencian Gothic style. A discontinuous spiral staircase gives access to the clock chamber, the clergyman's cell, the bell ringer's home, and the bell chamber.

The Kursaal of Algeciras is a building in the Paseo del Rio de la Miel of Algeciras, Spain. It is the work of artist Guillermo Pérez Villalta and architect Enrique Salvo. Also known as the Kursaal Congress Centre or Rio de la Miel, it was opened in 2007 after a decade of work. The building was designed in the late nineties as the seat of the Chamber of Commerce of Gibraltar but the work was halted until being rescued by the city council.
The Torre de la Plata is an octagonal military tower in Al-Andalus, located in present-day Seville, southern Spain. It was constructed by the Almohad Caliphate.

The Pylons of Cádiz, also known as the Towers of Cádiz, are two 158 m-tall pylons supporting a double-circuit 132 kV three-phase AC powerline over the bay of Cádiz, Spain, running from Puerto Real Substation to the substation of the former Cádiz Thermal Power Station, situated on the peninsula upon which the city of Cádiz stands.

The Torre de San Martín is a medieval structure in Teruel, Aragon, northern Spain. Built in Aragonese Mudéjar style in 1316 and renovated in the 16th century, it was added to the UNESCO Heritage List in 1986 together with other Mudéjar structures in Teruel.

Torre Alta is a tower located in San Fernando in the Province of Cádiz, Andalusia, Spain. Located about 120 metres (390 ft) from the Real Instituto y Observatorio de la Armada, the 18 metres (59 ft) structure is a listed Bien de Interés Cultural monument.

The Torre de los Adalides was a rectangular medieval look-out tower of Islamic design located in the vicinity of Algeciras, Spain. It was situated roughly 1 kilometre (0.62 mi) from the coast on a hill some 100 metres (330 ft) above sea level in the area which is now covered by the city's northern suburbs. The tower was demolished by the Spaniards during the Spanish–American War as they thought the Americans might use it as a base of their own. The ruins of the tower are within military limits and cannot be approached without a formal permit.
Torre del Arroyo del Lobo is a ruined medieval defensive tower near Algeciras, Spain. It is located in the cove of Getares, and monitored the stretch of coast from Punta Carnero to Punta de San García between the cities of Algeciras and Tarifa as part of the defensive system of the Strait of Gibraltar in the Middle Ages.
The Torre del Fraile is one of a set of military watchtowers built around the South and East coast of Spain to keep an eye on passing shipping and Barbary pirates. The watchtowers were in sight of one another and it was therefore possible to get a signal to Gibraltar from the watchtower in Tarifa. The tower was designed by Luis Bravo and Juan Pedro Laguna in 1588.

Torre del Rocadillo is a historic ruined tower, located about a mile to the west of Puente Mayorga in the municipality of San Roque in the Province of Cádiz, Andalusia, Spain. It was constructed in the 16th century.

Torre Ladrones is a tower on the Puerto de Cabopino beach in Marbella, Spain. It is part of the coastal fortification line along the Andalusian Mediterranean coast. Both the architecture and the materials used, indicate that Torre Ladrones was built during the period of Arab domination in the Spanish peninsula. It is 15 meters high, a figure that makes it the tallest watchtower of the Malaga coast. The interior is divided into three rooms and a housetop. At that time, its role was clearly defensive: to warn of potential enemies and to organize a coordinated defense in case the enemy attacked.

The Torre Nueva, also called Torrenueva and sometimes Torre Sabá, is a beacon located in the Andalusian town of La Línea de la Concepción and is one of the 44 towers of the same characteristics that dotted the Spanish coast from the river Guadiaro to the border with Portugal. All of them were built during the reign of Felipe III, along with others located along the Mediterranean coast from Málaga to Catalonia.

Torres de la Casería de Ossio is a complex of three towers of sixteen floors located in San Fernando in the Province of Cádiz, Andalusia, Spain. As of 2013 it is the tallest building in the city, surpassing the Hospital Militar de San Carlos by several metres when built in 2007.

Torreta de Guardamar is a 370-metre tall guyed radio mast erected by the US Navy near Guardamar del Segura, Spain. It was built in 1962 and is the tallest architectural structure in both the Iberian peninsula and the European Union. Its base is situated 64 metres above sea level at a distance of 1.4 km from the sea.

The Tower of Álvar Fáñez is a tower located in Guadalajara, Spain. The medieval structure, formerly part of the city's defences, is named after Álvar Fáñez, "Conqueror of Guadalajara for Christianity".

The Tower of Botafuegos is a tower located in Los Barrios, Spain. It was declared Bien de Interés Cultural in 1993.

The Tower of Llanes is a medieval tower located in Llanes, Spain.

The Tower of Paterna is a historical monument of the town of Paterna, in the province of Valencia, Spain.
The Tower of San Cristóbal is a Mudéjar tower belonging to the Church of San Cristóbal in Toledo (Spain).

The Tower of San Dionisio is a tower located in Jerez de la Frontera, Spain. It was declared Bien de Interés Cultural in 1978.

The Tower of Tajo is a tower located in Barbate, Spain. It was declared Bien de Interés Cultural in 1985.

The Watchtower of Arrebatacapas is a watchtower located in Torrelaguna, Spain. It was declared Bien de Interés Cultural in 1983.

The Watchtower of El Berrueco, also known as the Watchtower of Torrepedrera is a watchtower of Islamic origin located in El Berrueco, Spain. It is situated close to the El Altazar dam, atop a 1030 m hill in the Sierra de Guadarrama. It was declared Bien de Interés Cultural in 1983.

The Watchtower of El Vellón is a watchtower located in El Vellón, Spain. It was declared Bien de Interés Cultural in 1983.

The Watchtower of Torrelodones is a watchtower located in Torrelodones, Spain. It was declared Bien de Interés Cultural in 1983 (1)

The Watchtower of Venturada is a watchtower located in Venturada, Spain. It was declared Bien de Interés Cultural in 1983.