The Himalayas: So vast and unexplored that new species are still being discovered today.
http://wtnh.com/2015/10/09/from-dracula-fish-to-snub-nosed-monkeys-new-species-found-in-himalayas/
If you want the details, here's the actual scientific report:
http://d2ouvy59p0dg6k.cloudfront.net/downloads/wwf_lhi_species_discovery_report__2015.pdf
So, which of these new species do you find the most interesting?