The Mountain node from Houdini 19.5 cannot be found in Houdi

I'm a newbie, please bear with me.

Hi Wande! Sometimes you can find answers to your questions by going to our docs and searching for keywords like 'mountain'.

While "Mountain" as a node has been removed (in favour of the Attribute Noise node), it still exists as an alias for Attribute Noise in the Tab menu. If you're not seeing it in the Tab menu, you might be in the wrong context. You need to be in the Geometry context to see it in the Tab menu. It's likely you're at the Objects level.

Welcome to Houdini; shit can get pretty confusing pretty fast, but if you stick around it can work wonders for you.