In 1965, CIA lost plutonium capsules in Himalayas which, if damaged, could contaminate the water supply for 600 million Indians
[OC] Les Rochers Sculptés (the sculpted rocks) near St Malo, Brittany. Created by a deaf, mute priest in late 1800s.
This mineral (Cordierite) changes colour when rotated due to the crystal lattice’s lack of symmetry along all 3 axes (Pleochroism)