Valeria On The Moon

Poul Anderson, Operation Luna (New York, 2000), Chapter 47.

"First lunar landing ever!" (p. 414)

In how many timelines is that said?

The "...terrain..." (is that the right word?) is gray and black with gently contoured mountains under blue Earthlight. Like Neil Armstrong and Buzz Aldrin, Valeria Matuchek lands on the soil of the plain called the Sea of Tranquility. But before that her broomstick hits the wall of an invisible castle of the Fair Folk who have migrated from Earth. This ceases to be a credible Moon landing.

For Anderson's hard sf accounts of the Moon, see here and here.