Heat lightning can also occur if cloud-to-ground lightning occurs very far away and the sound dissipates before it reaches the observer. At night, it is possible to see the flashes of lightning from very far distances, up to 100 miles, but the sound does not carry that far.
Fungal Grotto is a 4-man dungeon in Elder Scrolls Online. It is located all the way at the western edge of Stonefalls.
The Grotto is an expansion to the ranch set inside a (slightly spooky) cave that allows a rancher to care for light-sensitive slimes without the need for a solar screen. Never has a phosphor slime felt so liberated.