Unspoilt Rajaji Tiger Reserve, covering over 1000 sq km in the forested foothills near Haridwar, was declared an official tiger park in 2015, with 34 of the striped cats within its boundaries. It's best known for wild elephants – around 600 at last count – and leopards (about 250). The park's only open mid-November to mid-June.
The thick deciduous forests are also home to chital, sambars, Himalayan Black bear, rarely seen sloth bears and some 300 species of birds. Though your chances of spotting a tiger are slim, you're likely to see some wildlife, and will get a feel for the wilderness.