Here is one of the most unique tracks I have come across so far. Located in Spain, this track actually has a hill added behind one of the straightaways, hence the “3D” part of the name. The architects of this track won an award in 2011 for its design. Be sure to check the links below for video and more photos of this interesting facility. While is seems pretty bizarre, it does add some interesting possibilities to workouts that could be done here.