El Rocío sits on the edge of Doñana's marshes in a kind of permanent suspended reality. The streets are wide and unpaved — proper Andalucían sand, not decorative, actually used by horses tied to hitching posts outside whitewashed hermandad buildings. It feels like a film set for a western, except it has been here since the 17th century and the devotion driving it is entirely real. The Hermitage of the Virgen del Rocío, the most venerated image in Andalucía, stands at the far end of the main esplanade, and you can visit it on any ordinary morning when the place is nearly empty.
The wildlife watching from El Rocío itself is exceptional. The Marisma del Rocío, a shallow seasonal lagoon right at the village edge, regularly holds flamingoes, spoonbills, herons and waders visible with the naked eye from the waterfront boardwalk. It is one of the few places in the park where serious birdwatching requires no special access, no tour, and no equipment — just showing up at the right time of day. Early morning and late afternoon are best.
The Romería, held on the weekend after Whit Sunday (late May or early June), transforms everything. Brotherhoods from across Spain make week-long pilgrimages by ox cart and horseback to converge here. The night the Blanca Paloma — the venerated statue — is carried out from the hermitage is one of the most charged moments in Spanish popular religion. If you are there for it, expect crowds, noise, emotion, and virtually no sleep for two days.