Puma Punku has 3 gates similar to the gates at Tiwanaku:

    a Gate that is propped standing up

    a Gate lying face down on one of the large sandstone blocks, and

    a “Sun” Gate lying back down.

I felt a strong attraction to these gates as well, especially the “Sun” Gate.  I call it the “Sun” Gate because of the frieze on it with what looks like Sun symbols.  I really really feel that these Gates were dimensional doorways, just like at Tiwanaku.  Maybe they still are...