What places in the world possibly have mammals we still haven't discovered?

Question

What places in the world possibly have mammals we still haven't discovered?

Answer 1

More new species of mammals are discovered each year in tropical rainforests, especially Amazon, Congo and SE Asia, than anywhere else.

Answer 2

Maybe there is some as yet undescribed species of bat or rodent in the forests of Indonesia. Or maybe in some nearly inaccesible place like the Himalayas.

Answer 3

bottom of the oceans...

oceans are still to be fully explored...Who knows what we find there...

Answer 4

the oceans

Answer 5

Parts of Africa, Madagascar, South America, South East Asia, and some parts of Australia are largely untouched by humans.  I am not saying it is probable, just possible.