Astronomers back in 1974 decided to sketch what they thought the lunar mountain named Mons "Pico" would look like if they were standing in front of it.
Mons Pico is a solitary lunar mountain that is located in the northern part of the Mare Imbrium basin. The mountain is very reflective and is known as a bright lunar object. The peak comes in at the height of 7,874 feet, and when blasted with sunlight, it can cause massive shadows across the lunar surface. Astronomers in 1874 were able to view the mountain but weren't able to get an idea of what it looked like if they were standing on the lunar surface looking at it.
So, they decided to draw it. Above is a sketch of Pico, with the caption stating, "An ideal sketch of "Pico," an isolated lunar mountain 8,000 feet high, as it would probably appear if seen by a spectator located on the Moon." Unfortunately, to the astronomers/artists that drew this sketch, their assumptions about the mountain weren't accurate. Below is an image of what Pico looks like today, and as you can see, the two images are very different. While the sketch from 1874 isn't accurate, the measurement for the height of the mountain is, which is certainly something to commend for the times it was estimated.