Arcachon Bay is a stunning coastal area known for its beautiful beaches, family-friendly atmosphere, and delicious seafood. It's perfect for a relaxing beach stay with your child, offering opportunities for outdoor activities like sand dune climbing and boat tours. The local markets and restaurants provide excellent options, including vegan-friendly dishes and fresh local produce.

San Sebastián is a stunning coastal city known for its beautiful beaches like Playa de la Concha, perfect for family beach days. It's a food lover's paradise, famous for its pintxos bars offering a variety of delicious and vegan-friendly options. The city also offers charming old town streets to explore and nearby outdoor activities suitable for all ages, making it a fantastic stop on your trip.

Santander is a beautiful coastal city in northern Spain known for its stunning beaches, delicious seafood, and family-friendly atmosphere. It offers a mix of relaxing seaside activities and cultural experiences, perfect for both adults and children. The city also has great options for vegan dining and easy access to outdoor adventures like parks and coastal walks.