How to get the list of top $N$ answers that have been upvoted the most?
For questions it is very easy, but not for answers.
I don't expect some hidden web page, but a database query would be perfect.
The search parameter
is:answer returns only answers, and you can sort this by votes: search results. This worries about score, and not simply upvotes (so a hypothetical answer with a huge number of up- and down-votes is likely omitted). It also doesn't give you the "top $N$", but it does order them correctly.
You can also use the SEDE, but the results here are not quite as "live" (the data is only updated on a weekly basis), though I don't expect huge changes in this list. (The linked query only counts upvotes, and ignores downvotes.)