The height of fall is about 40m also suitable for trekking. People who like birds and this place could bring them with a refreshment as there are so many varieties of birds.
When you book our cab to Ooty, you can plan to visit Kalhatti Falls. this will be an interstate travel and you have bear additional permit charges imposed by Tamil Nadu.
Althogh you can plan for a single day visit, it is good you stay atleast 1 night in ooty.