"夕陽無限好,只是近黃昏."
nothing gold can stay. isn't that sad?
"無限" is a good word, but hard to interpret it in English.
here is my try with borrowed words from your nice translation.
Happy Tour of Plateau
by Li Shangyin of Tang Dynasty
Towards evening hour I feel a bit low
And ride in a coach up the ancient plateau.
The sunset is such a splendid sight
Only it’s about to fade into the twilight.