This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
RavensteinTyrmonument. en The fourth of the four Yuan and Ming Dynasty monuments on the Tyr cliff Khabarovsk Krai seen ca by Permikin and described by Ravenstein based on the Russians' accounts in his book as follows And lastly about three hundred and fifty yards from the third of these monuments stands upon narrow promontory an