Buy a backpack. Tuck in a flashlight, some sandwiches and water, a pair of binoculars, ur windcheater / raincoat, and climb climb climb. There's trails all over, some not as prominent. You decide which one you would like to climb. The one I found started behind an old rundown cottage. It was a good climb up, but the view from top was definately worth it. The entire area was blanketed in fog and the tiny waterfalls down the sides of the hills were too many to be counted.
Try taking the quaint auto rickshaw while touring around in the city.
Better still if you would prefer a little exercise, hire a bicycle at a very nominal fee and peddle ur way around the market. Be careful while on the narrow streets. Jeeps, cars and auto rickshaws all add to the buzz around the market area.
Don't forget to catch a horse ride while ur at it. Horse chariots aren't too difficult to come by and should add to all the fun.
Taxis and buses are also available between Lonavala, Khandala and Karla.
Khandala does not have airports so one has to fly to Bombay or to Pune.
The nearest international airport is Bombay (~105 km) and domestic airport is Pune (~66km).
Khandala is a little bit to the south-east of Mumbai.
All trains from Mumbai to Pune, (or further South), stop at Lonavla, which is 5 kms from Khandala. These include the Shatabdi Express, the Deccan Queen, the Indrayani Express, the Udayan Express, and the Sahayadri Express. This journey takes about 3 hours, and costs within Rs. 100 for second class and within Rs. 700 for an air-conditioned chair car / executive class.
The trains are quite primitive and I remember vendors entering the train at every station with different eatables, whether tea, coffee, soft drinks, chips and sandwiches, etc.
The railway lines pass through at least twenty tunnels cut into the basaltic rock, an experience of a lifetime.
Take a taxi to get to Khandala from Lonavla.