Dignity Travel offers “Easy and Accessible” tours around the world. Kristin wrote that “I went on a guided tour to Iceland with… [them]…. and it was excellent. It was 100% wheelchair accessible and great for slow walkers. They even provided a wheelchair for me as I was a slow walker with endurance issues. I would recommend them to anyone looking to travel with a small group. They do trips all over the world that change from year to year but also have yearly trips to Machu Picchu and the Galapagos Islands.” Here is their website.