The Lonely Planet website has a section on accessible destinations. The section is looked after by Martin Heng. On the list of the 10 most accessible places in the world is Melbourne. The others are: Playa del Carmen, Mexico; Barcelona, Spain; Sicily, Italy; Manchester, UK; Ljubljana, Slovenia; Singapore; San Diego, USA; Vienna, Austria, and surprisingly, Galapagos and Amazonia, Ecuador. A short overview of each destination is provided and other information and personal stories are included on the site. With a focus on wheelchair users, it is essentially the most wheelchair accessible destinations.
Picture: Schonbrunn Palace Gardens, Vienna. They have a motorised ‘train’ that circles the site and takes people to the key viewing spots.