Gargantua (cave)

Gargantua is a limestone cave located on the Andy Good Plateau in Alberta and British Columbia, Canada. it has 6001 m of passages with a depth of 286 m. It contains the largest natural cavern in Canada at 290m long, 30m wide and 25m high.
In October 2002, a group of caving club students from W. R. Myers High School were trapped in the cave overnight, after failing to break through the waterfall exit.