The 11 Oldest Buildings in AmericaThe oldest buildings in the US are adobe structures in Taos Pueblo, dating back between 1000 and 1450 AD.
Scientists discover Earth has two secret mountains TALLER than EverestTwo massive mountains buried beneath the Earth's surface are over 100 times taller than Everest.
Hidden wonders: laser data reveal a dense network of ancient Maya settlementsAn airborne survey revealed over 6,700 ancient Maya structures, indicating a complex civilization in southern Mexico.