I am from new delhi and I visited chennai few months ago with family. We went to this queenland theme park and we had a very bad experience.
the park is located on banglore trunk road near sembarambakam in chennai.
what we saw was that few rides were in a bad condition or not working at all. Also few rides were good without a doubt. there are also some good eating places in the park and some good restaurants as well which serve decent food.
entry fee was perhaps the best plus point of this park.
its entry ranges from 600 to 400 INR which is quite decent as per the standards of the park.
some of my personal favorite rides are
alpen blitz
free fall tower
overall its a nice place to chill.