A visit to the 200m-high Main Tower skyscraper is a definite must for Frankfurt first-timers. Finished in 1999, it houses 62,000m2 of office space, has 2,550 windows, 1090 steps and employs about 2,000 people to keep it standing. The most useless fact we can give you is that it's a full twenty times heavier than the Eiffel Tower. The observation platform, on top of building at 200m, offers magnificent views of central Frankfurt and the surrounding region. There's no more appropriate place to order long drinks than up here; have a romantic sunset dinner or a boozing session behind the huge windows of the 53rd floor Main Tower Restaurant (open 17:30 - 01:00; Fri & Sat 17:30 - 02:00, closed Sun. & Mon).