Mocha Moche

Subject: How do I get to Mocha Moche?

Hint: How can I get across the gorge initially?

Hint: How can I get the rope yet still be able to cross the gorge?

Hint: How may I borrow the excavator's tools?

Hint: Is there an oddity I can get from the excavation site?

Subject: How can the ancient drawings near the stairs enlighten me?

Hint: What do I need to replace the rope at the gorge?

Hint: How can I get down to the niche from the top of tower?

Hint: How do I get past the observatory door?

Subject: What do I need to do in the observatory?