I had planned months in advance to see this important World Heritage Site. It was somewhat amusing to see others arrive expecting to just walk right in and finding the sign offered tickets 2 months later :) Also, please read the cautions - if you are sensitive to closed or low spaces, or have mobility issues then reconsider and go see Tarxien, Hagar Qim and Mnajdra. First you get an audioguide, then the guide takes you in to view a short introductory video, then you get to visit the site. It is truly fascinating. You need to let your mind go as to what all happened here. It was well worth the visit - and yes, it is a bit pricey, but it needs to be maintained in a controlled environment - all of which is expensive. I'm always happy to help maintain our Heritage Sites.