Arima Hotel & Spa

Arima is a design-forward boutique hotel tucked into the Marimon forest on the edge of San Sebastián, close enough to the city but far enough that the view from most rooms is entirely green. The spa runs hydrotherapy and massage alongside beauty treatments from Natura Bissé. The rooms quietly monitor temperature, humidity, and CO2, which sounds clinical until you sleep remarkably well. The hotel restaurant, Misura, looks out at the forest through a glass-walled kitchen.