Do I have to pay a Peru departure tax?
Yes, you must pay a departure tax for both international and domestic flights. These are, however, usually included in the cost of a flight. The tax on international flights is about US$30, while the tax on domestic flights is around US$9.

It's more than just having a good time or visiting beautiful places (although that's absolutely a part of it!), it's about being part of a unique experience that stays with you.