From the Glass Window plaque:

This man-made bridge took the place of what was once an impressive rock arch, destroyed by a raging hurricane.  The concrete replacement bridge has been battered by turbulent storms, as well.  Glass Window is a prime spot for viewing the striking contrast of the deep-blue Atlantic Ocean on one side and the gentle turquoise waters of Exuma Sound on the other.

Two large boulders lie about a mile south of the bridge.  Known as The Cow and The Bull, they are a testament to the powers of the sea that lifted them atop the ridge.  Also look for the blow hole just southwest of here.