A nice excursion near Otavalo is to go to the Lagunas de Mojanda at an altitude of 3720 metres.
A popular place of interest is to visit the Mitad del Mundo, a monument located on the Equatorial Line. It's a real tourist trap. The irony is that the monument is in fact located a few hundreds metres from the real latitude 0°0'0.
In the last years, several touristic places have been opened to attract people to the Equatorial Line. The only problem is that the vast majority of them are not really at latitude 0. I passed a few of these sites and I decided to only visit one if it was really located at the proper location.
Here is one of the only sites on the Equatorial Line; the Sundial of Quisato, a few kilometres south of the city of Cayambe.