'Cause what's more sultry than a steamy grotto in the summer sun? HM? Nothing, obviously.
Below is probably one of my favorite examples: a hidden grotto at the 14th century Villa La Pietra, in Italy. Look closely, the decor is composed entirely of pebbles and seashells. I wonder how long this feat of magnificence took to complete...
Below two images: The grotto pool at Deering's Vizcaya, in Miami, Florida.
First image, from Villas and Gardens of Tuscany, by Bajard and Bencini. Images of Vizcaya from Vizcaya: Museum and Gardens, Miami, Florida. Photographer: Steven Brooke.