Definitely one of the steeper pyramids we saw on our 2011 trip, in the Terminal Classic Puuc site of Uxmal:
As you might be able to tell, kids had no problems with these steps — the bigger ones were racing each other to the top! Regular adults have to do the usual angle-walk up the steps.
You might also notice that this is the only one of the pyramid’s four faces that has been restored. Aside from saving money up front (restoration isn’t cheap), this saves money over the long run too — since once you restore something, you have to maintain it. Restoration also (in a way) destroys — since you can never be 100% sure you’re restoring something exactly the way it once was. So 3/4 of this structure is being saved for future generations of researchers to study and (maybe) restore at a later date.