As of my last knowledge update in January 2022, there were certain restrictions and regulations in place at Machu Picchu to ensure the preservation of the site and enhance the visitor experience. Keep in mind that regulations can change, and it’s advisable to check for the latest information closer to your planned visit. Here are some common restrictions and guidelines:

1. Limited Daily Visitors:
   • The number of daily visitors to Machu Picchu is restricted to help preserve the site. It’s recommended to purchase tickets in advance, especially during peak seasons, as there is a daily limit on the number of visitors.
2. Guided Tours:
   • Visitors are encouraged to explore Machu Picchu with a licensed guide. Guided tours help provide context, historical information, and ensure that visitors adhere to site regulations.
3. Designated Trails:
   • Visitors are required to stay on designated trails and pathways to avoid damage to the archaeological structures and the surrounding environment. Climbing on or touching the ancient structures is strictly prohibited.
4. Time Limits in Specific Areas:
   • In certain areas of Machu Picchu, there may be time limits to manage the flow of visitors and prevent overcrowding. Pay attention to posted signs and guidelines from park staff.
5. No Food or Drinks in Certain Areas:
   • In some areas of Machu Picchu, especially near the archaeological structures, eating and drinking may be restricted to prevent littering and damage to the site.
6. Prohibited Items:
   • Items such as tripods, large backpacks, umbrellas, and walking sticks with metal tips may be restricted within the archaeological site. Check the guidelines to ensure you comply with the regulations.
7. Conservation and Sustainability:
   • Visitors are encouraged to follow sustainable and responsible tourism practices. This includes carrying out any waste generated during the visit and respecting the natural environment.
8. No Smoking:
   • Smoking is usually prohibited within the archaeological site to prevent damage to the structures and the surrounding environment.
9. Restrictions on Commercial Photography:
   • If you plan to take commercial photographs or videos, additional permits may be required. Check with the relevant authorities for any special permissions needed.
10. Special Regulations for Huayna Picchu and Machu Picchu Mountain:
    • If you plan to hike Huayna Picchu or Machu Picchu Mountain, there are additional regulations, and permits are limited. Ensure you secure the necessary permits well in advance.

It’s essential to be aware of and adhere to these restrictions to contribute to the conservation of Machu Picchu and ensure a positive experience for all visitors. Additionally, guidelines may change, so checking with official sources or your tour operator for the latest information is advisable before your visit.