Barcelona, is there any place I should get a ticket online before I go?

I know there's the option to get ticket online. Is there any place that's recommended to get a ticket beforehand online?

I will got to Barcelona tomorrow, so I hope the lines wont be that long ... also Im not sure when I arrive to each place so that's why Im concerned about getting a ticket if I would late an hour...

Thanks! :)

Submitted February 20, 2020 at 08:01PM by RaidenHUN https://ift.tt/2HG71Cn