Isla Cristina is young locality, and for this reason you can´t expect to find old monuments here., nonetheless it is a city with a short but very interesting heritage and history.
The Church of Los Dolores is one of the places that you must visit, same as the Church of the 12 Apostles in Redondela. Both from the 20th century. The Patio House of Saint Francis is maybe the oldest places to visit. It is a spot where all of the neighbors would gather, and where the Masonic Logia was formed in 1890.