Antigua Guatemala Things to do. Gray Line Tours its member of a Gray Line World Wide. Trully the local Expert. For more than 100 years, Gray Line has been at the center of creating and operating the best traveler experiences in the world’s. Gray Line Tours Guatemala member of Gray Line World Wide, we are a full service tour operator in Guatemala, offering an extensive line of travel services for visitors wishing to experience the best of the Heart of the Maya World. These services include airport transfers, half and one day tours and excursions, hotel reservations, cruise excursions, VIP services, multi day packages (shared and private departures) and much, much more. About one million tourists visit Guatemala every year and many of them find in us a reliable and recognizable supplier to book their travel arrangements. Gray Line Tours Guatemala is definitely the most professional, caring and quality tour operator. Our guiding principal is to provide total customer satisfaction both to the booking company and the traveler. Our dynamic and flexible procedures, competitive rates, creative sales efforts, highlytrained staff and excellent product line add up to provide a truly first class service. So far our name has become a synonym for the development and implementation of responsible tourism with local involvement in the entire region.