Lü is a village in the Val Müstair municipality in the district of Inn in the Swiss canton of Graubünden.

Of the rest of the land, 1.5% is settled (buildings or roads) and the remainder (18.6%) is non-productive (rivers, glaciers or mountains).

It is one of the highest villages in Europe, at an elevation of 1,920 m (6,300 ft) on a terrace above the left bank of the Rombach.

[4] In the 2007 federal election the most popular party was the SVP which received 98% of the vote.

A number of hiking trails start here, up the hills or down to the valley in summer and winter.

In fall 2009 - the International Year of Astronomy - a public observatory Alpine Astrovillage Lü-Stailas was inaugurated.

The Astrovillage is located on a terrace at an elevation of 2,000 m (6,400 ft) and has favorable geographical and meteorological conditions for astronomy.