Set within a historic building along Amsterdam’s Keizersgracht canal, the Dylan hotel has debuted a collection of modern rooms and suites that draw on the property’s rich heritage. Unveiled in March, the Serendipity Collection (priced from $763 per night) comprises 16 accommodations that blend wenge wood floors and a natural color palette with marble bathrooms and leather details. Two signature suites—each with floor-to-ceiling windows, a bronze chandelier, and a cast-iron staircase—were named for Jacob van Ca…