Kuala Selangor Sky Mirror. Kuala selangor beach is better known as "mirror of the sky "as the shallow waters of this "secret island" reflects the sky in all its going, thus creating . Day trips in kuala lumpur: The sky mirror in kuala selangor is one of the most impressive hidden gems in malaysia. The sky mirror is actually a seabed that appears above water during low tide, exposing an expansive sand flat that's approximately the size of a .