Felicitas Guerrero was a young and beautiful widow who was tragically murdered by a suitor, Enrique Ocampo (Uncle to the famous writer, Victoria Ocampo).
This church was built in 1875 by her grieving parents. The church features an eclectic design with gothic influences and is the only church in the city with secular statues (of Felicitas, her husband and children).
The exterior is stunning but you can tour the interior and tunnels below two weeks a month. Check their website for dates and to reserve your coveted spot.