Whether they're creepy skeletons climbing up stairs, terrifying baby carriages made of steel or castles popping up from a Lego book, the art of sculpture is always fascinating. These artworks are particularly interesting when they use non-traditional materials or settings.

A recent post at WebUrbanist has 40 examples of extraordinary examples of modern sculptures, including the Lego art seen here that was created by artist Nathan Sawaya. While the photos above are great, be sure to click on the link and look at all of the sculptures in the post, as they are all really interesting and beautiful.