# St Michaels Cave

- **Country:** Australia
- **Coordinates:** -33.629119, 151.339231
- **Depth:** 15 metres
- **Access:** not allowed
- **Length:** 110 metres
- **Geology:** Dolerite & Narrabeen Group
- **Hazards:** falling rocks
- **Location:** New South Wales, Australia

St Michaels Cave is situated in the Sydney suburb of Avalon Beach. This sea-side cave is around 110 metres long, 15 metres high and 10 metres wide. The original colonial owner was a Reverend John Therry, who planned to deliver lectures within the cave and build a church above it. The cave was formed by the erosion of a jurassic dyke through triassic sedimentary rocks. The cave is known to be a breeding site for Common bent-wing bats and Large-eared pied bats.

![Photo of St Michaels Cave](https://upload.wikimedia.org/wikipedia/commons/4/48/St_Michaels_Cave_Avalon_Beach_NSW_Australia.JPG)

**Source:** https://en.wikipedia.org/wiki/St_Michaels_Cave_(Avalon_Beach) (Wikipedia, CC BY-SA)