It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
send system transmission tower sntis mountain alpstein alpine snow swiss alps appenzell mountain station alpstein region transmitter sntis reinforced concrete swisscom broadcast mountain summit mountain peak summit great
Page 2017 Free-images.com. All images are Public Domain