In the United States of America has an unusual national park called Petrified Forest, which translates as Petrified Forest. This is one of the largest pockets of fossilized trees on the planet.
It is noteworthy that most of the trees even retained its structure. But we are not talking about all the national park, and one of his pearls - Agate House. According to research scientists, this building was erected the ancestors of the Pueblo Indians now living in these places. Moreover, this occurred during a time interval between the 900 th and 1200 th years. The then inhabitants of the prairies and deserts of North America extensively used petrified wood to create tools and, of course, in the construction. Agate House consists of eight rooms, which confirms - is not temporary housing.