Travel back in time at a folly in Scotland, a parador in Spain and a German castle • Tell us about your favourite church in Europe – the best tip wins a £200 holiday voucher Travel back in time at a folly in Scotland, a parador in Spain and a German castle Tell us about your favourite church in Europe – the best tip wins a £200 holiday voucher Guardian Travel readers' tips Every week we ask our readers for recommendations from their travels. A selection of tips will be featured online and may