Glide through old san juans 500 years of history on this 2 hour tour by segway known as the walled city old san juan was founded as a military stronghold and remains the oldest city under the american flag on this small group tour limited to 10 riders zoom around effortlessly and see more than 25 attractions learning from an informative guide about the citys role during the spanish empire world war ii and as a us territory capture stunning views of san juan bay castillo san felipe mo