On a hill in the northeastern part of the Old Town looms this massive Gothic church, Quito's largest, built over several decades beginning in 1892. Rather than gargoyles, turtles and iguanas protrude from the church’s side. The highlight is the basilica’s towers, which you can climb if you have the nerve – the ascent requires crossing a rickety wooden plank inside the main roof and climbing steep stairs and ladders (with solid handrails) to the top.