I visited Della Adventure with my office colleagues in January 2012.
its in Khandala, near Lonavala.
It is a great place to refresh.
They have so many adventure sports like Rock Climbing, Cricket, Rappelling, Archery, Golf, etc...
Other than cricket all other games, I experiencing 1st time.
Almost full day enjoyed in park.
As it was office function, we had night function as well.
gone for sleep at late night, Room was superb.

We visited Della Adventure for an official Team meet for 2012.
We reached Lonavala by Bus from Mumbai and it is not far from Highway.
From 1st sight it was looking amazing. (on gate they have mentioned it is best adventure park in India)
As expected it was superb. Full day we had enjoyed so many adventure sports like Rappelling, Rope Crossing, Archery, Wall Climbing even Golf was there.
It was great experience.
Almost full day enjoyed in park, not have much time to do anything in rooms because we were so tired. Rooms were clean and we had good sleep.
Love to Visit this place again.

If you are looking at a weekend breakaway, not too far from Mumbai, Della Adventure is the place to be.. Great location, nicely furnished & also well suited for a corporate event.
Negative is it can be boring ater a time to keep moving up or down in a jeep. Also, the walking distance is too much (Incase you get a far away cottage from the car drop off point)..
Overall, very pricey, but a good getaway

we had been to Della adventure as a part of training and picnic. we were a group of 20 .
our programme was designed for 2 days and 2 nights.
location of the resort is very very nice on a hill top . the owner is a very well known architect from Mumbai and therefore it is very well designed. all rooms are in the form of tents and are situated on slope of a plataoue. view is excellent. u can enjoy the sunset with great views of mountains and greenery all over. the rooms thogh in the form of tents are fully equiped with fridge, wi-fi connectivity , jacuzzi bath tub, sit out with chair and tables , well equipped large bathrooms with high end toiletories. we had a very nice time and the sports and adventure games are good too. there are many such .but i enjoyed the swimming pool games , tarzen swing and rappling the most.
there is a restaurant serving good food and breakfast.