The Grotto, Australia
The Grotto is a sinkhole geological formation and tourist attraction, found on the Great Ocean Road outside Port Campbell in Victoria, Australia.
The Grotto is a sinkhole geological formation. I would say this is the "hidden gem" of the Great Ocean Road, for it is relatively less well-known compared to other attractions and many people are not even aware of its existence.
Coordinates:
38°37'06.5"S 142°54'51.7"E