Geodesic domes have been used for everything from playground climbing equipment to homes, and now you can camp in one. The Cave from Heimplanet doesn’t use poles, but instead uses inflatable tubes from which you suspend the tent. It’s big enough to sleep 2-3 people, and it has storage pockets built in to help hold their gear. The tent folds down into a pack 20″ x 12″ x 8″ and weighing 11.5 pounds. (You’ll need to add a pump to your gear to inflate the tent.) It opens into a structure that covers 54 square feet and is 40″ tall inside. It costs €549.00 including 19% VAT, which converts to about $707. I don’t know if they ship to the US, but you could contact them to ask about shipping or to see if they have international dealers.