@smg4412
I am currently on the Mariner 24 World Cruise. There are have been many Overland Excursions offered along the way. Places I know they have been offered have been New Zealand, Australia, India and now Africa.
In India, many passengers disembarked in Kochi for The Taj Mahal (about 128 passengers), The Pink City and Tigers (8-10 passengers) and Kathmandu (24 passengers).
With our change of itinerary, many African safaris have been added with 6 or 4 nights off the ship and most ending in Capetown.
You can usually find the offered Overland Trip posted on the itinerary under Pre and Posts Hotels. Also, ask your TA.