The four star Palacio del Mar Hotel is located in the El Sardinero residential area in Santander, 100 meters from the El Sardinero beaches, 100 metres from the Palacio de Deportes and 200 metres from the Palacio Municipal de Exposiones y Congresos. It is just five minutes from the commercial and historic centre of the city.

The hotel offers 20 double suites, 40 junior suites, six senior suites and one imperial suite. Double suites have internet connection, air-conditioning (in the summer), bathroom, safety deposit box, satellite television, soundproofing, hair dryer and telephone. Junior suites have a mini bar and a separate bedroom and living room. Senior suites have a whirlpool bath and massage bed. Imperial suites are on the sixth floor and have a whirlpool bath, massage bed and separate bedroom and living room.

The Palacio del Mar offers different meeting-rooms to accommodate from 15 to 1000 people. Its modular distribution allows them to be adapted according to the needs of each meeting. The meeting-rooms are soundproofed and services on offer include internet access, mega phone, telephone, television and audio visual equipment. The hotel's 'Neptuno' restaurant serves traditional and seasonal cuisine, specialises in seafood and features a vivarium. There is seating for 90 people, air-conditioning, piped music and disabled access. The hotel has a piano bar, a coffee shop open all day (from 08.00 to 24.00 hours and a buffet breakfast from 07:30 to 11.00 hours.

Board basis available at this hotel is bed and breakfast, half board or full board.