Looking out of one of the Cathedral Caves, in the Catlins, New Zealand.

The Cathedral Caves are two connected limestone sea caves located on Waipati Beach, 15 kilometres (9.3 mi) south of Papatowai, on the Catlins Coast in the southeast corner of New Zealand's South Island. The two main cave systems join together within the cliff and one has a 30 metres (98 ft) high ceiling. Often blue penguins and fur seals will emerge from the gloom at the far end of the cave. (Full article...)