DENVER, CO - OCT. 26: The special walk-in shower with no threshold in the master bathroom can be easily accessed even if using a walker or wheelchair. Karen Harris, an architect, and husband Jim, a structural engineer, have built a home together in Denver that has been carefully designed to take them in to the future as they age, allowing them to hopefully stay in their home when they are older. (Photo by Kathryn Scott Osler/The Denver Post via Getty Images)