No visa required for citizens of most countries in the Americas and Western Europe. Citizens of Bolivia, Brazil, Colombia, Chile, Ecuador, Argentina, Paraguay, Uruguay and Venezuela can travel with their national ID. Maximum authorized stay is 183 days. Longer and non-tourist stays (residence, study, work, etc.) visas must be requested in advance at a Peruvian Consulate in the country of origin.If you travel to the mountains to avoid altitude sickness rest on the day of arrival, eat light meals; drink plenty of fluids and keep lemon drops on hand. In the Amazon, some repellent will protect you from mosquito bites and other insects. Detailed recommendations for each rea of the country (coast, mountains or Amazon) available at www.peru.travel