Barra Airport

Barra Airport is a short-runway airport situated in the wide shallow bay of Traigh Mhòr at the northern tip of the island of Barra in the Outer Hebrides, Scotland. The airport is unique, believed to be the only one in the world where scheduled flights use a tidal beach as the runway. The airport is operated by Highlands and Islands Airports Limited, which owns most of the regional airports in mainland Scotland and the outlying islands. Barra Airport opened in 1936. The airport's only destination is Glasgow.The beach is also popular with visitors and cockle pickers, who are asked to observe the windsock to see if the airport is in operation. In 2011, Barra Airport was voted No.1 in the world's top airport approaches by a poll conducted by PrivateFly.com, up from 10th place in 2010.

Source: Wikipedia