What is in this image? Describe it as if you were explaining it to someone from the 15th century.

Imagine a large carriage, but rather than being drawn by horses, it moves by its own means, crafted from materials that shine like metal cookware and as sturdy as the iron used in armor. This particular carriage is quaintly rounded in shape, with large circles for wheels, and patterns resembling eyes on the front, giving it a tame beast-like appearance. It has comfortable seats within for people to sit as it travels roads smoother and broader than the cobblestone streets you are accustomed to. This magical carriage needs no animals to pull it and can travel to distant places much faster than any horse could manage. It''s a wonder of our time, created by the melding of clever minds and new crafts.