Excursions
Castro-Urdiales: seaside village east of Santanderwith a nice Gothic church and lighthouse.
LaredoSpain: another seaside village to the East, the old quarter is worth a visit.
Potes: this small village is the key to the Picos de Europa mountain range which is a National Park, and the Liébana region. Good eating place, and the local orujo a strong spirits drink is highly recommended.
Reinosa: the main town on southern Cantabria, it's a good base to explore the Cantabrian mountain range Cordillera Cantábrica, with the Alto Campoo sky resort, the Roman city of Julióbriga and several Medieval churches close by.
Santillana del Mar: Picturesque stone village 1 hour away by bus; visit the famous cave of Altamira.
San Vicente de la Barquera - Sea-side fishing village, about 30 minutes by bus. See the fishing vessels unload what Madrid will be eating tomorrow. Fantastic tides, so stay for at least 6 hours. Nice Roman bridge.
Valles Pasiegos: for a taste of rural Cantabria, no better place than the Valley of the Pas river, especially Toranzo, Selaya, Villacarriedo, Vega de Pas, San Roque de Riomiera and San Pedro del Romeral. Try the typical sobaos and quesadas, two traditional desserts.
Ethnography Museum (Museo Etnografico de Cantabria Casa Velarde)
Parks
Jardines de Pereda
Santander's most famous park with a lot of trees, bushes and flowers, a pond, several sculptures, a music pavilion, a monument to the writer José MarÃa de Pereda 1833-1906, a fountain dedicated to the Cantabrian author, Concha Espina 1877-1953, the Fuente de los Meones and the city tourist office nearby.
Parque de La Magdalena
With 25000 m2 the biggest park in the city, surrounding the Palacio Real Royal Palace. It was deserted until the end of the 19th century and houses a hermitage dedicated to Saint Magdalena and a defensive castle overlooking the bay. It has a zoo on the rocky cliffs on the northern end, with lions, seals, penguins and polar bears and a galleon nearby that belonged to the sailor and adventurer Vital Alsar.
Parque de Cabo Mayor
Covering an area of more than 100,000m2, the park is extremely spectacular on windy days, when the waves crash onto the cliffs. The Faro de Cabo Mayor is the oldest lighthouse in Cantabria. It was built in 1839, is 30m high and its light can be seen from 29 miles away. The rock formation of the Puente del Diablo Devil's Bridge and the Panteón del Inglés Englishman's Pantheon is nearby.
Museums
Museo del Faro de Cabo Mayor
There's an art gallery and a strange collection of lighthouse images from popular culture--on everything from matchboxes to liquor bottles.
Maritime Museum of Cantabria
Biblioteca Menéndez Pelayo
Colección del Ateneo de Santander
Churches
Cathedral - Catedral de Santa Maria de la Asunción
Iglesia del SantÃsimo Cristo
Public buildings
Palacio de la Magdalena
Summer residence of the Spanish King from 1913 until 1930.