Palenque is a rich Maya archaeological site located in the present day Mexican state of Chiapas . It is smaller than other Mayan ruins sites yet extremley rich and well worth the extra effort to visit - so says all things Maya expert Chichen Itza Bob
Barringer Crater in northern Arizona is the point of a meteorite that was discovered in 1871. Crater - 170 m deep and 1.2 km in diameter. Meteorite collided with the earth 50,000 years ago, at a speed of 39 thousand miles per hour (64,000 km / h).