Sossusvlei and Deadvlei,
Words cannot express the beauty and majesty of this area. We booked our trip to Sossusvlei when we arrived at the hotel but I would strongly encourage you to book the tour early if visiting in the busy season. Sossusvlei was probably the busiest area we have seen.
You can go on your own to the area, hike Dune 45, and then take a shuttle to Deadvlei, but I would not recommend it. The shuttle gets busy and crowded and the driving their on your own is dangerous because the sand is so fine, that you risk getting stuck in the sand or worse, in a pothole surrounded by sand. Spend the extra money and get a tour guide.
We left the hotel at 6 in the morning with Michael, our tour guide and Melvin, the third person in our small little tour group. Michael drove, Melvin slept and Kiah and I watched the sun rise over the area and hit the sand dunes. When we started to get into the area, the morning was still early enough where the shadow of the sand dunes shaded the area to create a bright and dark contrast of the dunes. Kiah wanted to make sure she got some cool photos so here is one of her doing a handstand in front of some dunes.
We passed what Michael called the famous trees (the ones that are the majority of the postcards featured above). He had stopped at what used to be the famous tree but a branch broke off so now it is not as famous. He then drove us to Deadvlei and Kiah, Melvin and myself started to hike "Big Daddy" which is the tallest sand dune in the world at 350 meters. I hiked up a small portion and said "fuck this" and went back down but not before getting an awesome photo. Michael met me down at the bottom and took me around to Deadvlei where Kiah and Melvin would meet us. Kiah and Melvin hiked to the top of the dune and then walked barefoot all the way down from the top into Deadvlei. Towards the bottom, I would recommend putting shoes on because twigs and sticks are in the sand and Kiah got a blister at the bottom of the hill.
Deadvlei is beautiful. Truly. The sand dunes surround this area where a lake once sat. The dunes kept the water from coming in and the lake dried up. The sand was caught in the trees and just started growing bigger and bigger. The acacia trees in the area have been dead for about 600 years. The sun scorched their trunks, but although they are not petrified, they do not decompose because they are so dry. But the area is getting smaller and smaller and we saw one tree on the side that was about half covered as a testament of the area getting smaller.
We took so many pictures because the landscape and area were so beautiful. the best ones were the photos that Melvin shot on his Go pro. We look like we are in an album cover. We spent maybe an hour in Deadvlei total and the whole hike and photos took about 3.
After Deadvlei, we had lunch and then Michael drove us to Sesriem Canyon for some photos. He said that the last time the area got water was in 2011. We have seen water and flooding signs everywhere but seen no water at all while driving around.
Later in the afternoon, we hiked up some mountains for a view of the sunset and had a BBQ at the hotel. The food was delicious and we were treated to some entertainment by the people at the hotel singing some songs.

I would put Sossusvlei and Deadvlei on everyone's bucket list.