Admire Spain’s largest royal palace from the outside and enjoy the gardens; guided entry available if you want to go inside. Check palace opening times; usually 10:00–20:00 high season.
Traditional Castilian cuisine: roast suckling pig at Botín or huevos rotos at Casa Lucio—iconic Madrid dining; usually open for dinner 20:00–23:00. Reserve ahead.
Visit the futuristic complex—walk the exterior or buy tickets for the Oceanogràfic aquarium (open 10:00–19:00 typical); evening lighting is photogenic.
Early start if taking the Montserrat daytrip (mountain monastery and hiking) or Girona/Costa Brava half-day; otherwise prepare for departure. Montserrat services start early; check train/cable car times.
Train + rack railway or cable car to Montserrat (approx 1.5–2 hours). Visit the monastery, basilica and short hikes—sites usually open from 9:00 onwards; check monastery service times.