Siglistorf is a municipality in the Swiss canton that is situated by the lower course of what river?
Aargau The canton of Aargau (German "Kanton"    ; sometimes anglicized Argovia; see also other names) is one of the more northerly cantons of Switzerland. It is situated by the lower course of the Aare, which is why the canton is called Aar-gau (meaning "Aare province"). It is one of the most densely populated regions of Switzerland.
Wipptal The Wipptal (Wipp valley) is an Alpine valley in Tyrol, Austria and in South Tyrol, Italy, stretching between Innsbruck and Franzensfeste. The Brenner Pass (1,374 m) at the Austro-Italian border divides it into the northern, Austrian "Unteres Wipptal" and the southern, Italian "Oberes Wipptal". The "Unteres Wipptal" extends along the river Sill southward from Innsbruck, where the Sill meets the larger river Inn, up to the Brenner Pass. South of the border, the "Oberes Wipptal" stretches along the Eisack river by way of Sterzing to Franzensfeste. It forms the Wipptal District of the province of South Tyrol.