VOA慢速英语:Mesa Verde National Park: Protecting an Ancient Culture

site - n. a place where something important has happened

preserved - adj. kept in its original state or in good condition

steep - adj. almost straight up and down : rising or falling very sharply

slope - n. ground that slants downward or upward : ground that slopes

renowned - adj. known and admired by many people for some special quality

​ladder - n. a device used for climbing that has two long pieces of wood, metal, or rope with a series of steps or rungs between them

fragile - adj. easily broken or damaged

unexcavated - adj. not yet uncovered and explored by archaeological researchers