The Mongolian Death Worm is a mythical creature that scientists theorize could exist in Mongolia. This theory really sounds a bit too much like Tremors even how they plan to chase this mythical creature above ground using dynamite.
"The 1.5m Mongolian Death Worm - also known as the Allghoi Khorkhoi - is allegedly found in the Gobi Desert, but has never been captured on film. However, it has apparently been spotted by locals many times in one particular location in the south of the region." via TGDaily