Rivendell is one of the 10 biggest LEGO sets ever at 6,167 pieces, and includes every member of the Fellowship from J.R.R. Tolkien’s classic. The perfect space gift for adults who love collectibles.

Need a new project? Something relaxing to do after a tough day at work? Check out these amazing and complex LEGO sets designed for adult builders.

10 inches high, 17 inches long and 6 inches wide Price: $249.99 This motorcycle is bigger than it looks. In fact, it's the largest motorcycle set that LEGO has ever built, at 1:5 scale.

This 879-piece set lets you build an abstract scene comprised of various breakthroughs in the science world. The base is ...