在半岛北部，海拔足够低，因此古玛雅人能够经由被称为竖井的深层排水口或深洞探及地下水位。
In the northern peninsula the elevation is sufficiently low that the ancient Maya were able to reach the water table at deep sinkholes called cenotes, or at deep caves.
去进行洞穴探险。联系北威尔士探洞俱乐部。他们每周组织一次旅行，潜在重大发现的可能和矿藏勘探的意义。
Go cave exploring. Contact North Wales Caving Club, which organises weekly trips with the potential for significant new discoveries as well as mine explorations.
联系北威尔士探洞俱乐部。他们每周组织一次旅行，潜在重大发现的可能和矿藏勘探的意义。
Contact North Wales Caving Club, which organises weekly trips with the potential for significant new discoveries as well as mine explorations.
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