rarachose
adj. rare, unusual

selcouth
adj. extraordinary in appearance

cordate
adj. heart-shaped

trothplight
n. engagement to be married

The Croatian islet Galešnjak, in the Pašman Canal of the Adriatic Sea, is one of the few naturally occurring heart-shaped objects in the world.

It’s uninhabited, but the family that owns it provides facilities for engagements and weddings.