Perched on a meander in the Amstel, the Omval area that Ruby Emma calls home was for decades the powerhouse of Amsterdam. The gas supplied from the Zuidergasfabriek helped light and heat the city. These days, the newly formed Amstelkwartier is a more idyllic spot, but the focus on energy remains. Taking our lead from the mariners who tacked their sails to harness the wind on the river’s tight turns, Emma’s all about using the power of nature. From the thermal aquifer that stores our hot water to the building’s smart façade that reacts to the elements to heat and cool the hotel, green energy runs through Emma’s veins. Inside, the rooms all feature our Lean Luxury touches, including a big, comfy bed, aromatherapy Ruby Care products, and soft, fluffy towels, along with a Marshall amp to add some oomph to your audio.