Hey Bruce Wayne, light a match!!!

Mulu National Park is located in the interior of Sarawak, only accessible via small twin prop plane.
The airport is a landing strip carved out of the jungle.

The park's raison d'etre are a series of caves, which have been declared world heritage sites... basically they are so freakin' awesome, even the UN says so.
The caves are separated into show caves and adventure caves.
A show cave is pretty accessible for anyone who can spell cave and an adventure cave requires James Brooke's size balls and a complete disregard for life and limb.
We signed up for both.

In keeping with the baby step approach, we took a leisurely stroll to the mother of all show caves.

Deer cave has the largest opening (146 m or 480 ft) in the world and is breath taking to behold.
I had to include two photos, both of which fail to capture the true awe of this space.

Giant cave? perfect home for a giant bat? thankfully no, just nearly 3 million smaller ones.
Apparently, the bats have yet to work out the complexities of in-cave plumbing.
Once inside, your nostrils are assaulted with the sweet sweet scent of guano, a lovely word for bat shit.

I now deeply understand the term, bat shit crazy.

On the other side of the cave, is a small in cave stream leading out to the Garden of Eden.
Unfortunately due to the monsoon season, this "small stream" turns the rocks into an ice rink, making it virtually impassable.

Every evening, around dusk, the bats awake, and stream out of the cave, in black wave after wave, in search of human baby blood... ah ah ah...

The bats actually eat 3.5 tonnes of insects, specifically mosquitoes.
Later that evening, we enjoyed dinner, while bats circled the restaurant.
So begs the question... what freaks Heather out more, bugs or bats???