This is a file from the Wikimedia Commons and may be used by other projects. Information from its description page there is shown below. Commons is a freely licensed media file repository.
Summary
DescriptionCrystal-rock-hole.jpg
Deutsch: Kristallberg, hier der Felsdurchbruch, zwischen den Senken Farāfra und Bahriya, Libysche Wüste, Ägypten
English: Crystal rock with a rock hole, between Farafra and Bahriya depressions, Libyan Desert, Egypt
Date
Source
own photo, feb 10, 2005; Download from Wikitravel/de
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you alter, transform, or build upon this work, you must distribute the resulting work under the same license as the original.