The first piece is a watercolor created for the The Practical Guide to Fairies. The Grig watercolor I posted last month appeared in the same book. This picture depicts a small, underwater sandcastle, a place where small aquatic faerie folk dwell.
The second piece is a pencil drawing of a castle I did a few years ago for a Swedish company called Riotminds.
For those interested in such details: the watercolor was painted on Arches hot press watercolor paper and the pencil drawing was simply drawn with an ebony pencil on Strathmore drawing paper.