Complex sentence: The upper cave was discovered in 1958 by Lebanese speleologists, it is located above the lower cave and has been accommodated with an access tunnel and a series of walkways to enable tourists visit it safely without disturbing the natural landscape.
Split into simpler sentences: The upper cave was discovered in 1958 by Lebanese speleologists. Located above the lower cave, it has been accommodated with an access tunnel and a series of walkways to enable tourists safe visitation without disturbing the natural landscape.