The focal point of the ruins is the pyramid-like El Castillo that was once used by Mayans as a temple to the god Kukulkan. U.S. News Insider Tip: Visit El Mestizo, about 3.5 miles from Chichén ...

It is easy to think of our solar neighborhood as a tight little cluster of planets, but the reality is far more expansive. Beyond Neptune, a crowd of frozen bits and pieces lingers in the Kuiper Belt, ...