[ WP ] Recently a new tribe was discovered in a rainforest that has never been seen before . Rather than being behind the rest of the world technologically , they are far more advanced .

Amanda's machete swished softly through the thick wall of leaves and vines, as it had done for the past seven hours since leaving camp. They were four weeks out of Manaus, and had traveled upstream looking for the source of some rare-earth minerals that had flooded the marketplaces of small Amazonian villages. Natives had been selling cerium and neodymium as bits of scrap metal, not knowing the worth of these valuable materials. According to Amanda's contact, they claimed that that the metals were simply found in the jungle, already purified. Anyone with a discerning eye could tell you that these pieces were high quality and definitely unlike any lode found anywhere else on Earth. And the quantities were astounding. Amanda's company, Allied Electronics, wanted to find out where they were, and stake its claim before any competitors caught wind of it. 
 
 The machete came down with a hard *clank* that sent vibrations rattling through her arm. The cover of moss was thick, but that sound had not come from a boulder. 
 
 David, Amanda's companion, stooped for a closer look. They were two days from the supposed site where the minerals had been gathered, but who knows how wide of an area these metals were found in? This could be a whole second lode! He brushed the leaves and vines aside, kneeling in the soft mud. Being incredibly dirty no longer bothered either of them; one must give up comforts like `` cleanliness'' out here in the jungle. 
 
 It was a squat square of steel that hummed softly, if you put your ears close to the one side of it covered by fine mesh instead of metal plating. Practically invisible through all the brush, and certainly not audible over the constant whine of bugs and rain and wind and all of the other sounds of the Amazon. Stumbling across this thing was a one in a billion chance. 
 
 `` What is it?'' Amanda asked, still clutching the machete in her hand. 
 
 David was running his hands all over it until he finally found what he was looking for: Rivets. `` Some kind of casing,'' he said. `` There's something inside of it.'' He reached into his pocket for a multitool and began prying them up. 
 
 -- - 
 
 Amanda watched a snake curled in a nearby tree, which seemed to be lazily wondering why these humans had been obsessed with this box for the past hour. Her machete once again hung by her hip, put back in its loop once Amanda realized that they were n't going to make any more progress for the day. 
 
 David, on the other hand, was completely enthralled. The metal plates from the casing were scattered around him, and he had begun to disassemble whatever this thing inside of the box was, trying to discover what it did. He'd spent the last fifteen minutes just staring at a microchip that he'd pulled out of it. Like a kid with one of those `` spot the differences'' games in a magazine, he was noting every single miniscule detail. 
 
 `` I do n't think we're the first company here,'' he told Amanda. `` Whatever this is, the design is advanced. Far above what Allied produces. I do n't know *anyone* in the market who could make something like this.'' His face grew pale. `` Do you think it's the military? Is this some kind of testing ground?'' 
 
 Amanda was doodling in the dirt with a long stick. `` Nope,'' she said, bored with the conversation. As amazing as it was to find this little box, they had an objective to find, and this was n't it. `` Brazilian military is practically still at World War II levels, and there's no way that they'd let the Americans use something top secret out here.'' Relations between the two had n't exactly been friendly since the NSA spying scandal. `` And they would n't let anyone else in here either.'' 
 
 David went back to the little machine, which had ceased humming about ten minutes ago when he removed a small but powerful cooling fan. 
 
 `` We really should get going,'' she said, checking her watch. `` The sun is going....'' 
 
 Her gaze had gone up to the canopy to see how much daylight they had left. But her speech trailed off. 
 
 `` Going to what?'' David asked, still tinkering. Amanda did n't answer. 
 
 David adjusted his glasses and looked up. His companion was just staring off into space, jaw hanging open like Wile E Coyote in a cartoon. David followed her gaze, and promptly fell over. 
 
 Less than a hundred meters away, a sliver had appeared in the sky. Small, maybe only 30 or 40 meters across but at least 300 meters up. It was something like a doorway, with a dark grey background contrasting with the bright blue sky and fresh green of the jungle. Inside, in what appeared to be a vast dome, they could see a cityscape of towering skyscrapers, all lit with bright golden lights. 
 
 `` What the....'' Amanda could n't even finish her sentence. David was still rolling around in the mud, too busy staring at the slice in the sky to figure out how to stand. 
 
 Men approached out of the jungle as though they'd just materialized out of thin air. David and Amanda were so preoccupied that they were n't even aware of the new arrivals until they were only a meter or so away. 
 
 `` You'd better come with us,'' one of them said in perfect English, despite wearing traditional native clothes including full face paint. 
 
 Amanda took an unconscious step back and placed a hand on the machete. But one of the natives drew a weapon, made of dark metal and with a flashing light. It was n't any gun that Amanda had ever seen, but it was definitely a weapon. `` Not a good idea,'' the native told her. 
 
 `` Come where?'' David asked to the first man. 
 
 He looked at his companions, then back to David. `` Amrentaraz,'' he said. The name sounded a bit like a weird sneeze. Amanda and David had no reaction; it was n't a city on any of their maps. `` But our last visitor from the outside named it'El Dorado.''' 
 
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 If you enjoyed the story, you should visit my subreddit, /r/Luna_Lovewell! If I think of a good way to take the story, I'll try to write a continuation there tonight.
