Get High

The Kingdom Above, basically Heaven if you haven't much time, is a peaceful paradise accessible only to the most pure. To the east of the Harvest Reign is a massive tower stretching into the clouds, this is the elevator that takes visitors to the Kingdom Above. Simply enter and be assessed as pure and you'll be transported there. Purity is nothing to worry about at the start of a game, so head over as soon as possible if you really want the achievement. Assuming you are corrupted somehow you'll need to cleanse yourself at the chapel near the Human Reign before entering.