3Machu Picchu, Peru

Machu Picchu, the ancient Inca citadel nestled high in the Andes Mountains, is a marvel of architectural ingenuity and historical significance. However, the site faces multiple threats, including erosion, overcrowding, and improper preservation. To enjoy this archaeological treasure and breathtaking vistas, it’s essential to visit before it’s potentially further damaged or restricted due to over-tourism.