CrossFit Pamplona is located a mile and a half from central Pamplona in a commercial district like many CrossFit boxes. The gym is large, clean and welcoming. The class is coached in English and everyone there spoke English as well (lucky Americans!). The WOD was an AMRAP with cleans, pull-ups and a run that took us around the block and back. After a week of indulgence on Spanish tapas, it was great get a good workout in. WODs in the AirBnB will hold me over but there's nothing like dropping-in. As our family is from Pamplona, I tend to frequently wear my CrossFit Pamplona t-shirt.
Tip: If I know I'm going to drop-in while on a trip, I'll pack my wrist wraps and natural grips or other hand protection. They're my personal "must have," when doing CrossFit and they don't take up much room in my bag. They came in handy for this work out as I love my wrist wraps for cleans and grips for pull-ups, especially when using bars outside my usual gym's bars.
Remember CrossFit Drop-in Etiquette: Contact the box in advance, be courteous, and have a great time.