Not so long ago, in 1972, several treasure looters came across steps carved into the stone in the middle of the jungle in the northern part of the country, near the shores of the Caribbean Sea. Following the steps, a lost city or Cuidad Perdida appeared in front of them. They called it Green Hell. The site was reconstructed in the period from 1976 to 1982. A visit to this lost city includes 42 kilometers of hiking, so good physical fitness is required.