The remnants of a contrail over Frankfurt.
The moon over Frankfurt this morning (May 8) behind branches of a maple tree.
Clouds over the ridge near Rabacal, central Madeira, March 1.
Serra de Agua, situated more or less in the center of Madeira island, Portugal, Feb.28.
An Air China jet with its board landing lights switched on cuts through a thin layer of clouds shortly before landing at Frankfurt airport, Jan.14.
The full moon barely lights a layer of clouds from above, in Frankfurt, Jan.4.