Adventure Travel Tip: Sleep Warmer

"On a cold night sleeping at a high altitude, if you don't have a boyfriend (or girlfriend!) to cozy up to, try keeping warm this way: Fill an extra water bottle with hot water* just before you get into your sleeping bag and then hug it all night long. (I wrap mine in an extra t-shirt so that it feels snuggly!) And if you have the extra space, try filling another one to place at your feet."

—Annelies Hamerlinck is the owner of Vamos Expeditions in Peru and has been trekking and leading tours through the Andes for more than 10 years. Originally from Belgium, she's lived in Peru for nearly a decade and loves the Inca Trail trek to Machu Picchu. And though she spends almost all of her time traveling, Annelies hates waking up in a cold tent—which is why she won't leave for a trip without a Nalgene to cuddle.