Infinite Corridor — MIT Henge
http://web.mit.edu/mithenge/

The Infinite Corridor is MIT’s spinal cord. Many of our departments, classrooms, and labs radiate from here. Whatever you do, stay to the right when traveling the corridor and note that pedestrian speed increases dramatically when classes let out.

In mid-November and in late January every year, the circular path of the sun crosses the axis of the infinite corridor. When this happens the setting sun can be seen from the far end of the corridor. [As viewed from a stationary point on the earth, the path of the sun through the sky is roughly a circle which moves north and south as the seasons go by.] The arrangement of the infinite corridor so as to capture the setting sun at a particular moment is sometimes called MIThenge by analogy with Stonehenge.