See the best of frankfurt on an easy and convenient hop on hop off sightseeing tour the perfect do it yourself sightseeing tour in frankfurt the hop on hop off tour allows you to see frankfurts top attractions aboard an open top double decker bus with pre recorded multi lingual commentary with 14 hop on hop off stops conveniently located around the city you can see all the main sights including the romer town hall st pauls church the botanical garden and the impressive opera house ti