Shellwork and grottos
*Convento de Cristo, Tomar, PT - Window, Manueline style (PT: estilo Manuelino - is the sumptuous, Portuguese style of architectural ornamentation of the first decades of the 16th century, incorporating maritime elements and representations of the discoveries brought from the voyages of Vasco da Gama and Pedro Álvares Cabral)
The mysterious Margate Shell Grotto In 1835, young Joshua Newlove fell down a hole and inadvertently discovered Margate’s Shell Grotto. Seventy feet of underground tunnels lead to a chamber decorated with arcane symbols made entirely from sea shells. And the purpose of a cave studded with over four million shells mosaicked into phalluses, stars and flowers? Nobody really knows.
Margate Shell Grotto
The mysterious Margate Shell Grotto | The UK Curiosity Blog