The arched entrances and the carved chaitya (prayer hall) of the Karla cave complex have evoked curiosity in 20-odd engineering students of the K J Somaiya College of Engineering. They will soon spend three days in Lonavala which will be the base point for their visit to the iconic Buddhist cave trilogy of Karla, Bhaja and Bedse. They will close the loop with a trek to the rock-cut Kondane caves near Karjat, spending a good few hours under the waterfalls on the way to the historically significant Rajmachi village.