*free bag* Brunei at £570 rtn from London

Here's a wild card if we ever saw one...Brunei!

This tiny nation sits on the northwestern coast of the island of Borneo—yep, this Borneo! So, unsurprisingly, a whopping 80% of the country is covered in dense lush rainforests. 

If you're an animal lover, Ulu Temburong National Park is where you should head. Packed full of gibbons, sun bears and the world's longest snakes, this place is a living, breathing David Attenborough documentary. 

The forest is so thick, it's only accessible via a longboat ride upstream on the river, but this is included in all tours offered. For the best price, hold off pre-booking jungle trips online and wait until you're there. You will likely get a much cheaper rate if you buy tours in person with cash.