Hands down our best land trip was our safari to Africa in 2006.
We flew Virgin Upper Class JFK-LHR-JBG and then on to Port Elizabeth. We spent three days driving the Garden Route and exploring the Little Karoo. We then spent four days in Cape Town staying at a fantastic hotel; the Cape Grace. Next was Rovos Rail to Pretoria; two nights on train with only 37 passengers; 35 of them in our group. Next we flew to Singita which is a private game reserve in Sabi Sands for four days of pure luxury and fantastic game sightings. Our room was over 2100 sq ft with our own swimming pool and all food and drinks included. We ended the trip with a few days at Victoria Falls where we not only walked along trail in front of falls and flew over the falls in a helo; we also took an excursion to Namibia, Botswana, and Zimbabwe to see the only place in the world where four countries meet at a single point.
Three weeks seing China including Tibet was fantastic as were our two weeks in Jordan and Israel but the safari was probably the best.