Allee, allé, aleja, alej, аллея: all these words are the equivalent of the French word "allée" (i.e. avenue) in German (Allee), in Swedish, Norwegian or Danish (allé), in Polish, Slovenian, Latvian or Slovakian (aleja), in Czech (alej) and in Russian (аллея).

These terms are all used to designate a street, a road, a path or a canal lined with trees.

Have a look, for example, at the most beautiful "Alleen" of Switzerland: https://www.baumpflege-dietrich.ch/bern-thun-interlaken/images/pdf/medien/fachberichte/die_schoensten_alleen_der_schweiz.pdf

Or jump over to Sweden: you can choose to become a sponsor to the "trädallé" (tree avenue) of the Göta Kanal, a 190 km long canal built in the beginning of the 19th century: https://www.gotakanal.se/sv/tradfadder/

In neighbouring Norway, the Norwegian road authority awarded Borgestad avenue (Borgestadallé) the title of the "most beautiful road of the year" in 2012 : http://www.side3.no/dette-er-norges-vakreste-vei/3346855.html