Travellers wanting a glimpse of Peru's famed Machu Picchu will be restricted to visiting during morning or afternoon tours in a move aimed at conserving the site's archaeological splendor. The changes are a result of a 2015 study by a US archaeologist and recommendations from UNESCO on how best to ensure that Machu Picchu isn't hurt by rising numbers of tourists.

The new rules go into effect in July and will allow about 3,600 visitors to enter the ancient Incan citadel from 6 a.m. to noon and another nearly 2,700 people to explore during afternoon hours.

Previously, travellers could spend the entire day taking in the world-renowned site.

Visitors will also be required to use a guide-led tour.