Many families have this icon on top of their list of places to visit. Open every day, it stays open until midnight in summer (11 p.m. the rest of the year). It can be fun visiting at night when the tower is lit up with sparkling lights for a few minutes every hour. The queues for the lifts can be ridiculous, so why not take the stairs up to the first level, then the lift to the top. Tickets are cheaper, too.