You'll enjoy the museums and parks in Ciudad del Carmen City-Centre. You might want to make time for a stop at Our Lady of Carmen Church or Zaragoza Park.
Justo Sierra might not have many top sights, but Norte Beach and Church of Our Lady of Fatima are two attractions nearby that you can check out.
While Rafael de J. Lozano Contreras might not have many sights to explore, venturing just a little farther will lead you to top things to see and do like El Zacatal Bridge and Norte Beach.