Heinrich Hofmann's 'Am Rhein' is a quintessential late-Romantic miniature focused on tone color and sustained melodic beauty. It utilizes the piano's resonance to evoke the imagery of the Rhine river.
Focus on the subtle control of dynamics to avoid a percussive sound in the sweeping arpeggios.
Comparable difficulty and character — good candidates for what to learn next.
Am Rhein (Op.43) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Am Rhein (Op.43) lasts about 4 minutes.
Am Rhein (Op.43) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.
Pieces at a comparable difficulty and character include Ave Maria d'Arcadelt by Franz Liszt, Ave Verum Corpus de Mozart by Franz Liszt, Berceuse by Henryk Opieński — see the full similar-pieces list on this page.