"curious visitors" is correct and usable in written English.
You might use this phrase in a sentence such as, "The museum welcomed curious visitors from all over the world."
The prison discourages press and curious visitors.
Until recently, curious visitors could only peer over the wall.
The company has even opened its doors to curious visitors.
This somewhat asymmetrical focus is part of the draw for curious visitors.
Large numbers of curious visitors came to observe the black soldiers.
A military band played in the background, and Mrs. Merkel signed autographs for curious visitors.
The gallery got its cut and an influx of curious visitors.
A few curious visitors come to stare, while most pedestrians walk quickly past, their heads down.
Curious visitors have taken to exploring the ruins, and climbing its walls.
The other half of the greenhouse is a free museum: detailed signs walk curious visitors through a self-guided tour.
As the first city of the industrial revolution, Manchester attracted curious visitors from all over the world.
