What are other things to do than City Cards that are worth visiting in Barcelona?

The other unmissable things to do in Barcelona are:<a href='/barcelona-l45/culture-history-tc27/'>Culture & History</a><a href='/barcelona-l45/entry-tickets-tc123/'>Entry Tickets</a><a href='/barcelona-l45/activities-tc54/'>Activities</a><a href='/barcelona-l45/art-museums-tc28/'>Art & Museums</a><a href='/barcelona-l45/for-first-time-visitors-tc1139/'>For first-time visitors</a>

What are the best Barcelona City Cards?

The best Barcelona City Cards are:<a href='/barcelona-l45/barcelona-hola-barcelona-travel-card-with-multiday-options-t50000/'>Barcelona: Hola Barcelona Travel Card with Multiday Options</a><a href='/barcelona-l45/barcelona-card-25-museums-and-free-public-transportation-t22219/'>Barcelona Card: 25+ Museums and Free Public Transportation</a><a href='/sagrada-familia-l2699/barcelona-go-city-explorer-pass-choose-2-to-7-attractions-t407384/'>Barcelona: Go City Explorer Pass - Choose 2 to 7 Attractions</a><a href='/barcelona-l45/catalonia12-month-unlimited-visits-catalonia-monument-pass-t402924/'>Catalonia:12-Month Unlimited Visits Catalonia Monument Pass</a>