The Dutch government are considering a plan for a man-made island in shape of ... a tulip!
Dubai built Palm Island. Now the world leaders in land reclamation are considering an island in the shape of a tulip to fight overcrowding and shield the coastline from the rising sea. [...]
A government body set up to promote innovation has drawn up proposals for an island about 50 kilometers, or 31 miles, long, sparking fierce debate which inspired one blogger to joke that a cannabis leaf may be a more suitable shape than the tulip on the formal plans.
http://www.iht.com/articles/2007/12/10/asia/testrtrisland11.php - via Spluch and Scribal Terror
Although I'll admit man made islands kind of freak me out.