Vake Park is the biggest park in Tbilisi and is used for a variety of events and gatherings. It's huge - 200 hectares - and was opened in 1946 as a prime example of a Socialist Classical park, complete with a grand classical entry and a huge stairs leading to a people's monument.
The nature here is beautiful, as are the fountains. When there's not a festival here, there's usually one at the ethnographic museum, which is directly above it - about a 30 minute walk through a forest. There are also several beer gardens throughout, and it's a terrific place for exercise.
Most of the beergardens and cafes are on the eastern edge of the park.
Mon-Su: Open 24 hours