Among the most interesting LEED-certified building projects in 2016 is the K-12 Pathways World School in India, which used natural materials and was certified under LEED for Building Operations and Maintenance: Existing Buildings. Another notable project is the Lake Mills Elementary School in Wisconsin, the first LEED platinum K-12 school certified under LEED v.4 in the U.S.; its features include a green roof, a photovoltaic system, bioswales, and a 65-percent reduction in energy use. Meanwhile, the U.S. National Park Service spent the year LEED-certifying lodges, educational facilities, and visitors' centers. The Olas Verdes Hotel in Costa Rica earned LEED platinum certification for Building Design and Construction (BD+C): New Construction by using recycled glass in countertops and mosaics, and recycling wastewater into onsite vegetation. A LEED BD+C: Core and Shell certification was awarded to Union Stables, which efficiently reused a 1909 horse stable-cum-warehouse into an office and retail space. Washington state's Traffic Management/Emergency Ops Center received a LEED silver certification thanks to sound-rated walls to create a quiet space for emergency staff, among other features. The LEED platinum Right-Sized Passive Home was lauded for delivering a living space with nontoxic materials, salvaged wood, and an energy monitoring system. Finally, Honeywell's New Jersey headquarters was granted gold certification under the LEED for Interior Design and Construction: Commercial Interiors for leveraging light and reducing energy consumption.