This is the 8449th most frequent Russian word.
находящийся
Located; situated.
Here 'находящийся' is used as a participle describing the museum, indicating its location.
Музей, находящийся в центре города, очень популярен среди туристов.
The museum, which is located in the city center, is very popular among tourists.
In this sentence, 'находящийся' modifies 'the castle,' describing its position.
Находящийся на вершине холма замок видно издалека.
The castle located on the hilltop is visible from afar.
Here, 'находящиеся' is the plural form agreeing with 'people,' denoting their presence in the room.