Machu Picchu, the royal retreat of the Incan emperor Pachacuti, sits atop the Urubamba Valley in Peru. Meaning "Old Mountain" in the Quechua Indian language, the complex was constructed in the ...

As Machu Picchu has been drawing massive crowds, the Central American state has begun limiting the number of visitors per day. Only a certain number of tourists around 4,500, are allowed to hike ...