Are tiankeng and ground cracks dangerous in rainy days?

Dangerous. According to the query on Mafengwo Tourism official website.

1. The road is slippery and it is easy to fall: The soil on the pavement on rainy days absorbs rainwater and forms lubricant. On the way to the tiankeng and the cracks, the road is slippery and it is easy to fall. Therefore, the tiankeng ground is slippery and easy to fall. Sewing is dangerous on rainy days.

2. Obstructed view: Heavy fog permeates the tiankeng and ground cracks on rainy days, and visibility is low. Therefore, tiankeng and ground cracks are dangerous on rainy days.