In Ramyan, when King Sugriv directs his men in all directions in search of Sita. He instructs one group to go towards the east direction and asked them to look for a Trident etched on a mountain. King Surgive says that the Trident is "A long Golden flag-stick with three limbs stuck on top. It always glitters in when seen from sky".This trident is on the west coast of Peru – Lima and it really can be seen glittering from the sky even today
The perfect description can only mean that either Sugriv or somebody even earlier must have seen this trident from the sky, probably from an airplane (Vimana)!
Dr. Vartak says that the trident, a sign of the east was created by Lord Vishnu around 15000 – 17000 years ago.
The Trident of Peru in Ramayana | Mystery of india