Machu Picchu is one of the world’s seven wonders for a reason. The first time you spot this lost Incan citadel, shrouded in mountain mist, snaking up through lush green hills (and dotted with a few llamas), you’ll feel a thrill that has no comparison. And you’d have earned it. As a four-night adventure, it’s fair to say this trip is no walk in the park, but as you trek through the lush cloud forests, taking in the jaw-dropping Peruvian Andes and finally reaching the mystical Sun Gate, you’ll realise this is the most rewarding trek in the world.