For proof positive that, given enough time and gumption, anything can be stolen, we have this AP report:

A Norwegian family's swimming pool wasn't just bolted down, it was in the ground, but that was impediment to a band of determined thieves.

When the Nicolaysen family visited their mountain cabin over the weekend, they discovered a big hole in the yard in place of the swimming pool that had been installed 20 years ago.

Beats the hell out of the blow-up kind anyway.