Graham Speake ‘s book about Athos, Renewal in Paradise begins with a quote from The Station by Robert Byron.
Here Byron discribes that he is standing on the summit of Mount Athos with a clear view on Lemnos, the plains of Troy, the fingers of Chalkidiki, Mount Olympos to the west. But also the islands of Euboea and Skiathos (literally, the shadow of Athos). Two maps with almost every sight that was mentioned by Byron.
The observation by Byron is perhaps a little bit overdone but this picture by Phaethon72 shows that it is possible to see Mount Athos if you are standing on Mount Olympus.
This picture by Zedapell proves that you can see the mountain if you are on Lemnos.