"The Ambitious Guest" is a short story by Nathaniel Hawthorne. First published in The New-England Magazine in June 1835, it was republished in the second volume of Twice-Told Tales in 1841.
A young traveler stops for the night with a family that lives in a "notch" next to a mountain. They make friendly conversation, interrupted once by the sound of a wagon carrying other travelers, and then by the sound of rocks falling from the slope. The father reassures the visitor that rockfalls happen regularly without causing harm, but that the family has a "safe place" to go in the event of a serious collapse.
The group carries on with their friendly conversation. The visitor acknowledges that he is young and has no accomplishments of note, but hopes he will have "achieved my destiny" before he dies and then "I shall have built my monument!" The father expresses the wish for a more humble legacy.
Suddenly, they hear the sound of a much larger avalanche. They scream in fear of "The Slide!" and bolt outside for their safe place. But they are all caught up in the rock slide and killed, while the house is completely undamaged. Their bodies are swept away and never found. Locals mourn the loss of the family but are unaware of their ambitious guest.