The Sun Temple at Ingapirca

The Inca's Sun Temple appeals to me in all sorts of geeky ways (much like riding on the roof of a train, come to think of it!).

It is an oval base, exactly three times as long as it is wide, with a square building atop. The base lies on a precise east-west access, and the square building has two doors, one looking east and the other looking west. (Actually, even the pre-Inca Cañar ruins lie on the same axis). Around the base are remains of smaller buildings, apparently where the priests and virgins lived when they weren't performing rituals.

Unforunately, the Sun Temple must have been broken the day we visited, because there wasn't a lot of sun in evidence. :(