Walking around San Francisco without going up hills or stairs? Hard to believe it can be done but that is the core strategy of On The Level Walking Tours here. Where they go is mostly accessible for walkers, strollers, even wheel chairs. For example their new ramble around the hilly Presidio takes you through its military architectural history to the more recent Lucasfilm Center. Plenty of greenery everywhere as well as stunning views of the Golden Gate Bridge. A few other tours includes a Billionaires Row one in Pacific Heights and another visiting the gardens and mansions in the same neighborhood. Tours led by professional guide Marilyn Straka and generally go for two miles and two hours. Typical ticket price is $25.