The radio station in Grimeton was opened in 1925 for wireless radio links and today represents a unique technological heritage. It was added to UNESCO's list of world heritage sites in 2004. The facility, along with its six accompanying aerial towers, serves as the sole surviving example of a once-global network of long wave stations. Guided tours of the radio station are available as well as a visitor and information centre containing both a café and a shop.

What appears as a satellite dish or a radio telescope at first sight is actually a sculpture resembling a gigantic flower. Floralis Genérica has become a landmark in Buenos Aires' Plaza de las Naciones Unidas and was created and donated by Eduardo Catalano in 2002. Every morning, the 23 meters high petals open - moved by an electrical system. Supposedly, Floralis Genérica was the world's first mobile sculpture controlled by such a system. At sunset, the petals then close again, emitting a red glow from inside.

With its 95 meter high tower rising over the city centre, this Cathedral is hard to miss. Consecrated in the name of St Bartholomew in 1239, this cathedral was officially chosen to serve as the electoral site for kings of the Holy Roman empire in 1356. Ten imperial coronations took place here between 1562 and 1792.

Havana's waterfront boulevard – Malecón – is its most poetic stretch, a social hang out hub evocative of a welcoming Cuban living room (hence it being known to some as 'the world's longest sofa'). Waves crashing against Malecón's seawall can make quite the splash, at times virtually flooding parts of the boulevard, which hardly deters daily strollers from taking in its sublime sunset charm.