From Make Mag's description of 1.6 million beetle shells used to create this mosiac at the Royal Palace in Brussels, I now want to visit this to see it with my own eyes.
Reindeer watching in Norway from an amazing building located in the middle of (appearantly) nowhere. Can't wait.
Corsica - Map of rail network
Centre Pompidou-Metz looks like an amazing building to visit. Plus, their english website is one of the best museum websites I've found in France. Just a trainride away from Paris!