The Himalayas are a mountain range in China.
When Thomas arrived at the Himalayas, he spotted Nia at the top of the mountains, who was still angry with him, after being abandoned in Arizona. After accepting Thomas' apology, an avalanche caused by Thomas' yelling and whistling sweeped Nia away towards the edge of the mountain cliff.
Thomas tried to pull Nia to safety by himself, but a rock underneath her got dislodged, nearly causing both of them to fall. However, Yong Bao came to the rescue, and helped Thomas pull Nia to safety.
After the storm died down, the breakdown train was brought to put Nia back on the rails. Thomas later came here to try to find a runaway water wheel, and later helped Yong Bao rescue Lei.