On a budget, Cava Baja Tapas Street still earns its price.
Free (tapas/drinks pay-as-you-go)
If you do one self-guided crawl, this curving street packs taberna after taberna shoulder to shoulder, perfect for hopping a bite and a wine at each. The catch is weekend evenings are a crush, the most famous spots have waits, and prices have crept up with its fame.