 In the West, the South and the South-East, they are surrounded by Romance languages; in the North, by High Alemannic dialects.In the Swiss canton of Graubünden (Grisons) only the Walser exclaves in the Romansh part and the Prättigau, Schanfigg and Davos are Highest Alemannic; the Rhine Valley with Chur and Engadin are High Alemannic.The distinctive feature of the Highest Alemannic dialects is the lack of hiatus diphthongization, for instance 'to snow', 'to build' vs. High Alemannic , .