After a 'ride' that stopped at every resort between Playa del Carmen and Tulum to cram more people into the van, we arrived 1 1/2 hours later at 'headquarters'. After an orientation, which didn't warn you whatsoever about what you were about to get into, they took us out in the yard and loaded us up - 4 people per JUNK Jeep. Ours had one door that didn't open, NO windows that went down, NO AIR CONDITIONING, a half-flat tire (don't worry about it), one headlight that worked, mold on the headliner, all grab handles ripped out of the inner roof, etc. (It was 88 degrees that day). After 3 Jeeps broke down on the highway, before we got to the road going to the 'Biosphere', 4 Jeeps with paying customers moved on. Ours was overheating by now. We started down this Godforsaken road, which had 1 1/2' deep ruts AT LEAST every 4 yards. They were filled with muddy water. We drove down this road to hell for 20 - 25 miles! In a piece of crap they called a motor vehicle! Approximately 2/3 of the way back to where the boat picks you up, it gets real good. You drive through water approximately 3 1/2 feet deep! There was a large van stalled in the middle of the 'road' at one point. (Who could tell where the road really was?) Our hunk of junk made it back to the end, but the water that flooded in was literally up to the top of the back seat! My wife's butt was soaked with muddy water. When we got back to the point where we were supposed to get on the boat, we all decided that, since it was now 1:30 p.m., we weren't going any further, since we didn't want to try and go back through that crap in the dark. Who knows what might be out there in the jungle at night? We finally convinced them to take us back. The 'mechanic' drove us in his Jeep about 2 miles at 50 mph (he was pissed). He hit one of the mud holes so hard and fast that his Jeep quit (ignition system flooded). So, he left us alone in the jungle for 2 1/2 hrs. (You have no cellphone signal out there either). He finally came back with another Jeep, which got us another 4 -5 miles closer to civilization. At that point, we met a large van (like the ones stuck in the deepest water) and we switched once again. When we got to the 3/4 to 1 mile stretch where the deepest water is, there were now 2 vans stuck in the middle. It was starting to get dark by now. Our driver very carefully went by the stalled vans on the left, trying to not fall off the edge of the road. We made it by, went another 100 feet, and the van stalled. After cranking and cranking, by some miracle, it started! It was obviously running rough, but he kept it going, and we chugged the remaining 1/2 mile or so to dry road again. The women were crying by this point, but we all cheered! The rest of the trip back was pretty uneventful (if you don't mind being jolted by the remaining 12,072 more chuckholes). We arrived back at our Playa del Carmen resort at 7:00 or 7:30. (They tell you you'll be back by 5:00 when you book). I wonder what time the poor people who actually completed the tour got back? I wonder how many of them might have been stuck out there in the mudhole in the jungle all night?