This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A monument erected in a high place, such as a hilltop, indicating the direction and distance of notable landscape features which can be seen with the naked eye from that point.

"The Amplitur extended two of the four digits on the end of its right tentacle and impacted the drifting topograph."

topography   

toposcope