We visited Santillana del Mar while a rally was taking place, so there was a little more activity than usual, with some extra traffic, noise and movement around the town. It made getting around slightly less straightforward in places, but it certainly did not turn the visit into chaos or spoil it. Once we were exploring the historic streets, the rally was just one of the things happening that day. Santillana del Mar has enough to see that it is worth visiting even when there is an event going on, although a quieter day would make it easier to appreciate the town at your own pace.

Santillana del Mar is one of the best-preserved medieval towns in Cantabria, in northern Spain. Its historic centre is made up of narrow cobbled streets, stone houses, old towers and large mansions built by wealthy local families. Much of the architecture dates from the fourteenth to the eighteenth centuries, and the town developed around the Collegiate Church of Santa Juliana. It is also on the northern route of the Camino de Santiago, which helped make it an important religious and commercial centre during the Middle Ages.

Santillana is sometimes called the town of the three lies: it is said to be neither santa (holy), llana (flat) nor del mar (by the sea). The saying is more of a joke than a precise description. The name comes from Santa Juliana, the saint whose relics were associated with the religious community that developed here. The streets certainly are not flat, and the historic centre is inland rather than directly on the coast, although the wider municipality does extend to the sea.

The main landmark is the Collegiate Church of Santa Juliana, a Romanesque building whose origins go back to an earlier monastery traditionally dated to the ninth century. The present church was built mainly during the twelfth century, after the religious community had grown in importance. It has three naves, several semicircular apses and a cloister decorated with carved capitals showing religious scenes, animals and other figures. The main entrance is particularly notable for its sculpted decoration, including a representation of Christ known as a Pantocrator. The church is considered one of the most important examples of Romanesque architecture in Cantabria.

The monastery helped the settlement develop into the town that exists today. According to local tradition, monks brought the relics of Saint Juliana from Nicomedia, in present-day Turkey, and established a religious community here. The settlement gradually took the name of the monastery. In the eleventh century, the institution became a collegiate church, and its influence expanded through donations and privileges granted by local rulers. In 1209, Alfonso VIII of Castile granted the town a charter, strengthening its position as an administrative and religious centre.

The streets around the collegiate church are among the most interesting parts of Santillana. Calle de Santo Domingo is one of the main historic routes, lined with stone buildings, balconies, coats of arms and traditional houses. The Plaza Mayor is surrounded by important historic buildings, including the Torre del Merino and the Torre de Don Borja. The former dates from the fourteenth century and was associated with the royal representative who administered the surrounding territory. The latter is generally dated to the fifteenth century and is another of the town’s most recognisable medieval buildings.

There are also several Renaissance and Baroque mansions. The Palacio de Velarde is one of the best-known Renaissance buildings, while the Casa del Águila y la Parra is associated with the town’s later architectural development. The former Palace of the Barreda-Bracho, now part of the Parador network, stands on the main square. These buildings reflect the wealth of families who acquired land, held official positions or became involved in trade. Many have stone façades, wrought-iron balconies and carved family coats of arms. Their relatively close spacing gives the historic centre a consistent appearance, even though the buildings belong to different periods.

Santillana’s history is also connected with the Camino de Santiago. Pilgrims travelling along the northern route passed through the region on their way west towards Santiago de Compostela. Religious institutions, inns and local businesses benefited from the movement of travellers, and the collegiate church became an important destination in its own right. The old streets preserve much of this historic layout, although today they are also filled with shops, cafés, restaurants and visitors exploring the town.

The most famous attraction in the surrounding area is the Cave of Altamira, located a short distance from the historic centre. The cave is one of the most important prehistoric art sites in the world and is often called the Sistine Chapel of Palaeolithic art. Its painted ceiling includes images of bison, horses, deer and other animals, using red ochre, black outlines and the natural shapes of the rock to give the figures depth. Some paintings date back to around 14,000 years ago, while the wider archaeological record of the cave covers a much longer period of prehistoric occupation.

The cave was known in the nineteenth century, but its paintings received international attention following the work of Marcelino Sanz de Sautuola, who studied the site and published his findings in 1880. His young daughter, María, is famously associated with noticing the painted animals on the ceiling. The discovery was initially met with scepticism in some scientific circles, as many researchers found it difficult to accept that prehistoric people could have created art of such quality. Later discoveries in other caves eventually helped establish the authenticity and importance of Palaeolithic cave art.

Altamira is part of the UNESCO World Heritage property originally inscribed in 1985 and later extended to include seventeen additional decorated caves in northern Spain. Together, these caves provide exceptional evidence of artistic expression during the Upper Palaeolithic, broadly between 35,000 and 11,000 BC. They also offer information about the lives and beliefs of the communities that produced the paintings and engravings.

The original Cave of Altamira has extremely restricted public access because changes in temperature, humidity and carbon dioxide levels can damage the paintings. The museum’s current arrangements allow only five visitors per week to enter the original cave, through an existing waiting list that is presently closed to new applications. For ordinary visitors, the main experience is therefore the Museo Nacional y Centro de Investigación de Altamira and its Neocueva, a detailed reconstruction of the cave. The replica allows visitors to see the painted ceiling and understand the structure of the cave without putting the original artwork at risk.

The museum explains prehistoric life through archaeological finds, reconstructions and displays about hunting, tools, food and artistic techniques. It provides a broader view of the people who lived here, rather than concentrating only on the paintings. For anyone interested in prehistory, the museum is one of the main reasons to visit the area, and it can easily be combined with a walk around Santillana’s historic centre. Opening times vary according to the season, and the official website recommends checking tickets and arrangements in advance.

There is more to discover around the municipality beyond the historic centre and Altamira. The Santillana Zoo is another family attraction, with animals from different parts of the world. It is separate from the prehistoric museum and offers a different type of visit. The surrounding countryside also has walking routes through green fields and traditional settlements, while the nearby coast offers small beaches and geological features.

One particularly interesting coastal destination is Santa Justa Beach, near the village of Ubiarco. It is a small sandy beach beneath limestone cliffs, with a chapel built against the rock above the shore. The Ermita de Santa Justa dates from the sixteenth century, and its position makes it one of the most distinctive small religious buildings in the region. The nearby cliffs also illustrate the geological processes that have shaped the Cantabrian coastline. The area is part of the Costa Quebrada Geopark, where folds in the rock, cliffs and beaches provide visible evidence of millions of years of geological history.

Santillana del Mar is also known for its local food. Cantabrian cheeses, traditional meat and vegetable stews, seafood and regional pastries are available in the town’s restaurants and shops. Two local specialities are sobaos pasiegos, butter-rich sponge cakes from the nearby Pasiegos valleys, and quesada pasiega, a baked dessert traditionally made with fresh cheese or curd, milk, eggs, sugar and flour. The historic centre has plenty of places to stop for a meal or a coffee, although prices and visitor numbers can be higher in the busiest parts of town.

For anyone visiting by motorhome, it is worth planning where to park before entering the historic centre. Many of the old streets are narrow and are better explored on foot. A rally or another large event can make the area busier than usual, so allowing a little extra time helps avoid unnecessary frustration. During our visit, there was some additional traffic and activity because of the rally, but the town remained enjoyable and the event did not overwhelm the experience.

Santillana del Mar combines a well-preserved medieval centre with one of Europe’s most important prehistoric sites. The collegiate church, towers and historic mansions explain how the town developed around a powerful religious institution and the Camino de Santiago, while Altamira offers a rare connection with the lives and artistic abilities of people who lived here thousands of years ago. The nearby coast, walking routes and smaller attractions provide further reasons to explore the area. Even with the extra activity caused by the rally, Santillana remained a worthwhile stop, with plenty to discover beyond its main streets.