A vast number of man-made mounds have been identified across the Lower Mississippi Valley in North America, spanning across incredible distances. To this day however, a great mystery surrounds this sudden burst of earthwork constructions set to have happened over 5,000 years ago and dating as far back as 8,000 years ago. At a time where native American cultures and hunter-gatherer societies were believed to only rely on primitive behavior, the world’s largest effigies and mounds arose in precise alignment with celestial references and events.

How can travel help us surmount our fears, forge our identities, and change our worldviews? Here's an exhaustive compilation of 28 short but powerful TEDx Talks from around the planet, purposed to motivate us to get out of our comfort zone, pushing us off the beaten track and inspiring us to travel to destinations... hidden deep within ourselves.

From the mountains of South Africa through the fertile riverbanks of the Gambia, all the way north to the Nubian Desert of Southern Egypt, the African continent has been the firm ground on top of which thousand-year-old cultures have built incredible megalithic stone structures. Here are 10 notable megalithic sites in Africa scattered across 10 different countries you should be aware of when planning your next trip to the continent.