I haven't joined any RR in the last months but a few weeks ago Violet invited me to join her Unesco RR. I thought it could be a nice opportunity to get new and different cards, so i joined group 82.
Simona "lunanai" from Slovenia sent me cards from her country (not in this post), Germany, Mexico and China.
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The large medieval centre of the city is a UNESCO World Heritage Site since 2006.
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The ruins of Chichen Itza archeological site and Dzibilchaltún are the two best places to appreciate the equinox. This is an archaeo-astronomical phenomenon, where Earth is illuminated by the sun the same way in the northern hemisphere and in the south.
On the evening of 21 March and 22 September during the spring and fall equinoxes, respectively, there is a solar projection consisting of seven triangles of light, inverted, as a result of the shadow of the nine platforms of the pyramid, at sunset, simulating the image of a snake down through the banisters of the stairs of the north staircase of the Kukulcan Pyramid or El Castillo at Chichen Itza.
This phenomenon of light simulates a snake descending majestically through the banisters of the stairs of the Kukulcan Pyramid at Chichen Itza. The first shadows of the pyramid begins to draw isosceles triangles that make up the body of the feathered serpent that seems to move slowly downward until the head of the snake reaches bottom of the balustrade.
This phenomenon of light simulates a snake descending majestically through the banisters of the stairs of the Kukulcan Pyramid at Chichen Itza. The first shadows of the pyramid begins to draw isosceles triangles that make up the body of the feathered serpent that seems to move slowly downward until the head of the snake reaches bottom of the balustrade.
When the last of the triangle reaches the base of the balustrade, all spectators stand up and raise their hands to absorb the positive energy that emanates from this phenomenon. - in: http://www.discoverchichenitza.com/chichen-itza-mexico/spring-2010-equinox-at-chichen-itza/
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