The World Heritage Cities of Spain
There are 15 Spanish cities which are UNESCO World Heritage Cities. This is more than any other country in the world.
http://whc.unesco.org/en/list
Here is the list of the cities and what to see in each:
1. Alcala de Henares
Colegio Mayor de San Ildefonso
Paraninfo
Chapel of San Ildefonso
Monastery of las Bernardas
Calle Mayor
2. Avila
The Walls
Cathedral of Salvador
Convent of St. Thomas
Basilica of St. Vicente
Route of St. Theresa
3. Caceres
Tower of Bujaco
Tower of the Pulpits
Arch of the Star
Concatedral of Santa Maria
Palace of the Golfines
4. Cordoba
The Mezquita
The Cathedral
Medina Azahara
Alcazar de Los Reyes Cristianos
Plaza de la Corredera
5. Cuenca
Cathedral of Santa Maria and San Julian
Barrio of San Martin
City Center
Museum of Spanish Abstract Art
Convent of the Esclavas de la Merced
6. Ibiza
Sa Caleta
Necropolis of Es Puig Des Molins
La Almudaina
Dalt Vila
Cathedral of Nuestra Señora de las Nieves
7. San Cristobal de La Laguna (Canary Islands)
City of the Renaissance
San Cristobal
Church of La Concepcion
Cathedral of Santa Maria de los Remedios
Casa del Corregidor
8. Merida
Theater and Amphitheater
Aqueduct of Los Milagros
National Museum of Roman Art
The Alcazaba
Basilica of Santa Eulalia
9. Salamanca
The Cathedral
Plaza Mayor
The University
Real Colegio de Jesuitas
Palace of Monterrey
10. Santiago de Compostela
Cathedral of Santiago of Compostela
Plaza del Obradeiro
Monastery of San Martin Pinario
Plaza de la Quintana
11. Segovia
The Aqueduct
San Miguel Church
The Alcazar
The Cathedral
Church of San Millan
12. Tarragona
The Walls of Tarraco
Aqueduct of Ferreras
Cathedral of Santa Maria
National Archaelological Museum
Amphitheater
13. Toledo
The Cathedral
The Alcazar
Church Monastery of San Juan de los Reyes
El Greco in San Tome and Museum of Santa Cruz
14. Ubeda
Holy Chapel of El Salvador
Hospital of Santiago
City Hall (Palace of Vazquez de Molina)
Palace of Vela de los Cobos
Palace of Dean Ortega (now the Condestable Davalos Parador Nacional)
Church of San Nicolas
Palace of the Marquis of Mancera
Church of San Pablo
15. Baeza
Cathedral
Plaza del Populo and Casa del Populo (now the tourist office)
San Felipe Neri Seminary (now the International University of Andalusia Antonio Machado)
Palace of Jabalquinto
Town Hall
References:
1. Descubrir el Arte Magazine (No. 113).
2. Website: http://www.ubeda.com/index.htm.