The first day I would build
Give the city one clear route before adding extras.
- Start with Aquarium of Valencia and Negra Hipolita Park while energy is high.
- Use Dunas as the natural reset instead of crossing town too early.
the easier plan is Aquarium and park first, Dunas or shopping nearby, wider movement only with local advice. That keeps the day readable instead of turning every good name into a separate detour.
I would rather leave one place for tomorrow than drag a tired route through city center just because it looked close on a map.