The oldest neighborhood in Buenos Aires is San Telmo. Underneath the neighborhood is a labyrinth of almost 2 kilometers of tunnels. The first of these were built as escape routes for Jesuits in the late 1700s.
Later in the 1800s they were expanded and used to reroute a creek. In the early 1900s they were abandoned and stayed that way until someone purchased one of the old large houses and started to restore it – accidentally finding the tunnels.
Today a number of them serve as an events center and art museum.
RDZ Photography 