1. The Empire State Building in New York City, which was retrofitted with a geothermal HVAC system in 2010.
2. The Salesforce Tower in San Francisco, which uses a geothermal heating system to help meet its energy needs.
3. The Sheikh Zayed Tower at Johns Hopkins Hospital in Baltimore, which features a geothermal system that provides heating and cooling.
4. The Geysir Green Energy Building in Iceland, which uses a geothermal system to provide both heating and cooling.
5. The Queen's University Biological Sciences building in Ontario, Canada, which uses geothermal energy to provide heating, cooling, and hot water.
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