One of the fun things about Mudd is that most of the computer labs, as well as the major social gathering point (the Muddhole), are located in the basements of the concrete-block buildings; i.e. some classes take place underground. Most of these buildings are also covered with thousands of concrete "handholds," called "warts" by the students, perfectly suited for buildering, except that while some are set into the wall others are simply glued on. In addition, these warts have the unusual usefullness of being great 'shelves' for unicycles and skateboards. One can walk towards Galileo Hall and see the warts (especially those on the inside of the buildings) being used to stack unicycles and skateboards. Interestingly enough, the unofficial mascot of Harvey Mudd (featured on many college handbooks and other publications) is one of these concrete blocks with a smile, arms, and legs, named "Wally the Wart."