Kuelap, Northern Peru
Explore Kuelap, nicknamed the Machu Picchu of the north, an important Chachapoya citadel and the largest ancient stone structure in South America.
The fortress, once the home of the Chachapoyas, is a spectacular walled settlement made out massive limestone blocks. Climb up to the Kuelap watch-tower for a full view of the ruins. The site boasts amazing views across the valley below but it can get a bit windy due to the altitude so wrap up warm! Opt to walk up the hill to the site or take the cable car part of the way.