Amanita muscaria, the "Fly Agaric".
Picture by @thomas_ruf_photography.
"An account of the journeys of Philip von Strahlenberg to Siberia and his descriptions of the use of the mukhomor there was published in English in 1736. The drinking of urine of those who had consumed the mushroom was commented on by Anglo-Irish writer Oliver Goldsmith in his widely read 1762 novel, Citizen of the World. The mushroom had been identified as the fly agaric by this time. Other authors recorded the distortions of the size of perceived objects while intoxicated by the fungus, including naturalist Mordecai Cubitt Cooke in his books 'The Seven Sisters of Sleep' and 'A Plain and Easy Account of British Fungi'. This observation is thought to have formed the basis of the effects of eating the mushroom in the 1865 popular story 'Alice's Adventures in Wonderland'".