Tierra Santa- This is a religious theme park. It is a bit crazy/bizarre, but go if you are looking for a very, very unique experience. Jesus is resurrected every hour on the hour.
Ask to see the wine cellar and they'll take you through a vault to "The Harrison"
“La Viruta” at Armenia and Cordoba, inside the Armenian Cultural Center (odd, I know). 1am+ on Wed, Sat, and Sunday are awesome. "Incredible wildlife"
One of the best antique markets in the world with 250 booths and stands pops up Sundays in San Telmo's Plaza Dorrego.
