Here there was a large space, where the tree-ferns grew in long lines crossing each other, and making a denser shade than usual.
On the lower side were several stone edifices of immense size; and in the middle of the place there arose a singular structure, shaped like a half pyramid, with three sides sloping, and the fourth perpendicular, flat on the top, which was approached by a flight of steps.

We now went on until we reached the central portal of the range of caverns, and here we stopped.

The chief got out and beckoned to me.
I followed.

He then led the way into the cavern, while I, full of wonder, walked behind him..