。
She visited Laurie's house.
Literal
[topic-は] Laurie [genitive-の] house [object-を] visited.
訪れる ('to visit') has a slightly more literary flavor than its near-synonym 訪ねる — both are used for visiting people or places, but 訪れる more often appears in narrative prose and can also describe abstract things 'arriving' (a season, an opportunity). 春が訪れる ('spring arrives') is the most familiar metaphorical use. The を marks the place visited, treated grammatically as the object of the visiting action.