This is the 3588th most frequent Korean word.
방문한
"Visited."
In this sentence, '방문한' (visited) modifies '기억' (memory), indicating that the memory is about the act of visiting, demonstrating past action.
나는 어제 친구의 집을 방문한 기억이 생생하다.
I vividly remember visiting my friend's house yesterday.
Here, '방문한' (visited) describes the noun '사람들' (people), specifying which people are being discussed.
방문한 사람들이 모두 축제를 즐겼다.
The people who visited all enjoyed the festival.
In this context, '방문한' (visited) qualifies '경험' (experience), detailing that the experience relates to visiting countries.