Vina is a short subway ride from Valparaiso. You can catch the train at Estacion Puerto and you have to buy a subway card. The ride is only about 25 minutes and Vina is a world away from Valparaiso. Where Valpo is working class, Vina is the Chilean version of posh.
I exited at Estacion Vina which is near the Parque Quinta Vergara, a nice park with horse drawn carriages. I chose this exit because it was the closest to the Corporacion Museo de Arquelogio e Historia Francisco Fock (or the Fock Museum). The Fock Museum is quite small but focuses on the inhabitants of Easter Island (Isla Pascua) and actually has a Moai head outside. It was surrounded by a by a bunch of bushes and I had heard that people had vandalized it. WTF?
Anyway, it was a great little museum and it also featured a section on Shrunken Heads (not sure why) but very informative.
Vina is also famous for a Flower Clock (Reloj de Flores) but it wasn't that exciting to me.
Overall, I much prefer Valpo to Vina...it just seems more alive.