Villa Nina is ideally situated. Walking distance from the beach (250m) and only 15km away from Barcelona (North) and Sitges (South). It is settled in a very quiet and safe area. The street is one way (not very busy even during summer).
The city is surrounded on the West and South by the natural park of Garraf: a wonderful place for mountain bike, hiking and climbing. The view is breathtaking. There is also a lovely buddhist temple on top of the mount for the most courageous or the most faithfull! ;)
Many other activities are available in Castelldefels: all kind of watersports (Nautic club at 500m), but also the Olympic Channel (rawing), 30 clay tennis / padel courts, a 25m swimming pool and a golf practise are only 500m away from villa Nina.
I also highly recommend bike or roller blade rides by the sea. Plenty of ice cream shops and chiringuitos along the way can reward your efforts... ;)
Of course Castelldefels offers a wide range of restaurants and bars and also clubs. It has also several commercial centers (1,5km from the villa), opened 7days a week. So no need to go far for shopping at Zara, Bershka, Mango, H&M, etc... Cinemas are in the same commercial centers together with all kind of shops.
During winter time, it is also very easy to go for some of the best ski resort from the Pyrenees. Les Angles, La Masela, La Molina, Font Romeu, etc... are only 2h00 drive from Villa Nina. Last but not least, piano and guitar available at Villa Nina to make good times in Spain even happier...