Mojave National Preserve
The few specimens I have seen from this rather vaguely defined location all display the same extreme tilting and even a similar 'narrative' within the tilt.
Extraordinary Tilt Thunderegg from the Mojave National Preserve
Countries:
USA - Canada - Alaska - Mexico - Argentina - Peru - France - Germany - UK - Poland - Greece - Turkey - Romania - Bulgaria - Slovakia - Kazakhstan - Uzbekistan - Russia - Japan - Ethiopia - Iran - Australia - Unknown