A fairly strenuous all-day trek up Maenem Hill (3150m) and back leads through woodland and the springtime-blooming rhododendrons and magnolias of the Maenam Wildlife Sanctuary. Continue to Bhaledunga Rock for sweeping views. There's just a chance that you'll encounter red pandas and monal pheasants (Sikkim's state animal and bird respectively). Start as early as possible as clouds tend to hide the summit by early afternoon. Find a local to accompany you (for around ₹1000). Bikram Rai (8768442600) has plenty of experience.