100 Places To See In Your Lifetime-Heaven On Earth#84-Monte Alban, Mexico♥-"A flattened mountaintop some 5,000 feet about Mexico's Oaxaca Valley is the site for Monte Alban, the ruins of the nerve center of the ancient Zapotec culture. Construction began some 1,000 years ago and, over time, included temples, fabulous plazas, and observatory, underground passageways, a ball court, and the most intricate system of tombs extant in the Americas."