Peru
Besides the obvious walk through the stones, go up the small hill right oposite the archeological site and behind it you will find a nice slide of stone and a small field away from guides and tourists! Great for a picnic or siesta.
Sacsayhuaman, take a taxi from the main square in Cuzco to the site, 5 min from Cuzco, don't pay more than S/.5 and get the taxi driver to come and pick you up later, for another S/.5. You need a ticket to get in, S/.35 but gets you into more than 8 other sites.
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