Picnic at Hanging Rock
This cache is located at Hanging Rock Falls, near Nimbin, NSW. Only a 15 minute drive from Nimbin or Kyogle lies this little gem of a place that is a popular cool-off spot for the locals in summer. There's a parking area on the side of Williams Road, and a 5 minute trek down the path will bring you out at the river. The track forks: left takes you to the top of the falls - right takes you to a sandy river bank upstream known as 'The Beach'...and to the cache. The beach offers a safer, quieter spot to swim - and much more suitable for kids.
Hanging Rock Creek pours only a few meters into a large round pool, though this isn't any old swimming hole - it was made from a ancient lava tube from the Mount Warning volcano all those millions of years ago. No one knows how deep the hole is - divers have been down 20m and haven't touched the bottom. Some believe that it could be 100m deep!
There is a dark side to this place though - serious (preventable) accidents happen far to frequently and there have been three deaths in recent years at the falls. Most accidents occur to people using the rope swing over the pool. It's been pulled down by concerned locals many times, but keeps re-appearing. People using the swing climb the bank on the western side of the river and drop 15m into the waterhole below. The edge of the falls can be slippery too so make sure you don't get too close, and keep a real good eye on the kids.
The cache is a small lock and lock container. I've included a spoiler pic and a detailed hint as there is considerable tree cover in the area.