Ross Bridge over the Earn River in Comrie, Scotland (United Kingdom)

 The river blue, that lapses through the valley, hears thee sing,
And murmurs much beneath the touch of thy light-dipping wing;

The thunder-cloud, over us bow'd, in deeper gloom is seen,

When quick relieved it glances to thy bosom's silvery sheen.

From the lyrics of  The Swallow

by Robert Chambers