The term ‘travertine’ encompasses a wide variety of continental carbonate rocks deposited from groundwaters and surface waters. These include, but are not limited to, mineral spring deposits, stream and lake deposits, and cave formations and are recognized by interesting morphologies such as spring mounds, fissure ridges, cascades, step pools, and speleothems. These beautiful deposits are often popular tourist destinations, such as Havasu Falls, Ariz., and Yellowstone National Park hot springs. Larger economic deposits are mined for building stone such as that from Bagni di Tivoli, Italy, which was used for the construction of many famous buildings in ancient Rome. Humankind has used travertine systems literally for millennia for art, building stone, and water sources.