Barcelona has a highly efficient public transportation system that includes metro, bus, train, and tram. It's best to purchase a T-10 ticket for €10, which provides ten rides on any mode of transport. Taxis are also readily available but can be more expensive, especially during peak hours. Walking and biking is a great way to explore the city, as many attractions are within close proximity to each other.
If you want to add more cultural activities, visit Fundacio Joan Miro or Palau de la Musica Catalana. If you have less time, prioritize exceptional attractions like La Sagrada Familia and Park Guell, and skip other activities. To make the most of your trip, avoid peak season and tourist hours, and bring comfortable walking shoes, sunscreen, and a reusable water bottle.