Going to the north of the island, you can enjoy two most beautiful waterfalls in the island:
The locations of both waterfalls are very near so that you can visit both at the same time. I recommend you to go from Senggigi than Mataram (the capital city of Lombok) because to shorten the trip.
Arriving there, you can hire the guide to explain the history of the waterfalls on the way to the waterfall. Don’t hesitate to bargain to get the best price. It’s about IDR 200,000 – IDR 250,000 (12-15 EUR) per visit.
Note: Allocate 1 special day to go to these waterfalls. Malimbu can be your stop before or after the waterfalls. Don’t include any other destinations.
Picture is taken from Indonesia tourism forum