Leukerbad is a municipality in the district of Leuk in the canton of Valais in Switzerland. The story of Leukerbad dates back to the 4th century B.…Leukerbad is a municipality in the district of Leuk in the canton of Valais in Switzerland. The story of Leukerbad dates back to the 4th century B.C. Graves and ceramics attest the presence of habitation in Leukerbad. From the 5th century, the pass of the Gemmi, a unique link between the cantons of Valais and Bern, has been in use.