Multi-level dropdown with a hierarchical list [on hold]

I have a nested list of categories. E.g. Nature => Wildlife => Lion. .

The level of nested categories can go down to a nth amount of depth and the list can have many other categories and their nested categories.

I initially thought a select widget might be best to display this on the website, but most frameworks don't support nesting further than one level.

Thus, I was wondering if someone could help me understand a more appropriate pattern to display this list on the website?