Places I've been: Lake Parumbeet, Victoria, Australia

 The old parumbeet quarry.

 

X-beds found in ash deposits created by pyroclastic flows.

 

Partial view from the crater rim. The lake is the biggest maar crater that's currently filled with water. Jackson van der Hove (Monash University) is currently working on a number of geophysics surveys to determine how many vents are in this maar.