Sea Shell Shadows

There is no sea to speak of
Here in Salamanca, Spain,
But there's a house where scallop shells
(Though made of clay) do reign.

The outer walls are lined with them
In rows up to the roof.
(Just Google "House of Shells" in case
You need to have more proof.)

And when the sun is overhead
You'll see a sight so fine,
For all the shells make shadows,
Quite diagonal in line.

Our Spanish guide, however,
Had some trouble at that site.
She couldn't make the sound of "sh;"
It wouldn't come out right.

So sea shell shadows had to be
Her private bane, I'll bet;
But since she laughed about it,
It's a place I'll not forget.