Well over half of Bristol-based Rock and Sun’s customers are solo travellers. And Spain’s Costa Blanca is home to, in its words, “an countless quantity of limestone”, providing an enormous number of rock climbing experiences for all ranges of capacity. Accommodation is in a spacious villa in the Jalon valley, useful for outlets and restaurants. Solo swimmers are very welcome on Strel’s swimming adventures – 40%-50% of individuals are lone travellers. The swim tours take place in Slovenia, Croatia, Montenegro, Greece, Turkey and the US.