Rotomairewhenua — better known as the "Blue Lake" — is frequently cited as the clearest lake in the world.

In 2011, a group of scientists studied the remote lake and discovered some of the cleanest waters on the planet. Surrounded by 15 other lakes in New Zealand's Nelson Lakes National Park, Rotomairewhenua reaches 252 feet deep, and visitors can see well into its watery depths thanks to the glacial waters that feed the lake, keeping it clean and clear. In order to reach Rotomairewhenua, you can either hike through the wilderness for four to seven days, or take a water taxi to Lake Rotorua, and then hike approximately 5 miles to Blue Lake Hut, which provides bunks for overnight travelers. Because the lake is a sacred body of water to the area's Indigenous peoples, swimming is prohibited to keep Rotomairewhenua in its pristine, natural condition.

Travel Anywhere, Sleep Everywhere With FlyKitt's Patented Protocol

Ready for a jet lag-free trip? FlyKitt has your back. Their unique approach kicks in the day you leave, tackling all the usual travel woes from low energy to brain fog. The FlyKitt App lays out a personalized plan, so you're never guessing when to eat or rest. Developed with top military and sports expertise, FlyKitt is trusted by the best, including Navy SEALs and pro athletes. Get 10% off with code NOJETLAG and travel like a pro!

The Safest Countries for Road Trips

Often, the best way to explore a new country is by hitting the open road. But some nations are safer bets than others for road trips, thanks to the quality of their road infrastructure, traffic laws, and other important factors. Here are the 10 safest countries for road trips.

6 Destinations That Are Virtually Unrecognizable From 100 Years Ago

What a difference a century can make. See how six popular U.S. tourist destinations have dramatically changed over the last 100 years.