Thong Pha Phum National Park

This seldom-explored park sprawls across a serrated mountain range along the Myanmar border. Billing itself as the 'land of fog and freezing rainforest', mornings at the park have a brooding beauty, particularly when cold-season mist fills the valleys.

Visitors can enjoy waterfalls, trekking and the 'Tarzan' treetop accommodation near the end of one of Thailand's most remote and winding roads.

The park teems with wildlife, including elephants, tigers, bears, serow (Asian mountain goats), marbled cats and palm civets, though most animals are shy. That said, barking deer and kalij pheasant often wander through the visitor centre (8am to 4.30pm) and lodging area.

Thais know the park for its challenging ranger-led overnight treks (16km round trip) to 1249m Khao Chang Pheuk, which offers 360-degree views.