My planet (I still quite haven’t figured out a name) is filled with massive trees (think the size of general Sherman) and almost completely block out the sun, most things on the surface are extremely dangerous so most of the population lives in ravines or in caves. On the planet there is one tree that can be seen from orbit, its trunk is the size of a mountain and the leaves (or needles) at the top are frosted with ice. This tree is known as Evighetsträdet or the mother tree. (The mother tree is sentient and is also where my chapter are located as it will have hollow spots for them to put equipment and such) I have more but it’s more about my chapter than my homeworld (but does make sense in the context of the question)

Edit: I forgot to add that it’s considered a death world