Cheap flights from London to Santander from £31

This early 20th-century building at the top of the Magdalena Peninsula is one of the main tourist attractions of Santander. Around a century ago, it was the summer residence of King Alfonso XIII and Queen Victoria Eugenia de Battenberg. The palace has not only a magnificent facade but also a beautiful interior with furniture from the 16th-18th centuries. The palace chapel will impress you with its 17th-century altars, the Saleta de la Reina, a private room of the queen.

The casino was opened more than 100 years ago, in 1916. The Modernist-style exterior of the building is combined with a richly decorated interior. The stained glass window and stairway are especially noteworthy. As for gambling, the casino offers slot machines and houses poker games. Even if you are a fan of neither, the architecture alone is worth a visit.

In Spain, the maximum alcohol limit is 0.5 grams per litre of blood. For drivers with less than two years of experience, it is even lower — 0.3 grams per litre. The fine for violating those restrictions ranges from €301 to €600. That, as well as safety, seems to be a good reason to leave the car in a parking lot if you expect a few relaxing drinks in the evening.