Boomerang Cave has a nice 150 foot entrance drop that is a free rappel most of the way down. The cave becomes progressively more technical the deeper you go, but from all that have visited, they have said it is one of their favorites.
If you go, make sure you don't miss the side passage at the bottom of the first pit, before you make your way climbing up to the second drop. You'd have to work your way around some logs but it's an extremely short crawl just to visit that one extra room in the cave.
You can also see more pictures from our friends blog here: http://www.family.brandonkowallis.com/?p=15
The following images are courtesy of Nicholas Ballard.
The entrance
Looking back up at the entrance
Working our way to the side room at the bottom of the entry pit.
A small stalagmite in the second pit.
Some nice formations in the second pit.
Rigging at the top of the third pit.
Some flowstone and draperies in the top of the third pit.
The bottom of the third pit
Signing the cave register at the bottom of the third pit.
Here is a link to a map of the cave: http://www.jonjasper.com/ MapGallery/BoomerangCave.pdf
You can also see more pictures from our friends blog here: http://www.family.brandonkowallis.com/?p=15