Earthwatcher's photos with the keyword: sink hole

A closer view through the 'window' in the side of a sink hole showing the Allt Smoo cascading down a second sink hole into Smoo Cave.

View southwards showing the northerly flowing Allt Smoo disappearing down a sink hole (beneath the bridge) into Smoo Cave. In the foreground a nearer sink hole has a 'window' connecting to the other sink hole down which the river cascades.