Bélem Tower was built together with the Jeronimos Monastery between 1501 and 1521 for the discovery of the way to India.

The Oceanario of Lisbon is something absolutely to do. It takes around 3 hours and it has the hugest  fish tank I've ever seen. Such fish tank is made in Plexiglas and is circular with volume of 5000 cube-metres. Inside the Oceanario there are 500 species of fishes, animals and plants of different worlds areas.

 30 minutes far from Lisbon there is Sintra with its Pena Palace. The former summer residence of the Portuguese Royal Family, now just a museum.

It deserves to get lost in Lisbon. It is safe and with a lot of nice hidden corners to see.

After a visit to Belém Tower remember to take a rest at Pastéis de Belém where you can taste the homonymous cake invented in 1837. Served warm you have to add sugar and cinnamon and you'll try one of the greatest culinary experiences of your life.

Everything in Istanbul is suggestive but the Basilica Cistern is something more.

It was built by Emperor Constantine as cistern for Constantinople Grand Palace under the main square of the city. It continued to be used for Topkapi Palace till the last years of its use.

Casa Battlò was an existing building bought by the industrial Josep Battlò who assigned to Antoni Gaudì the work to renew it. Gaudì's job lasted between 1904 and 1907 ending in the wonderful example of modern architecture inscribed on the UNESCO World Heritage List in 2005.

One place you must not miss, but it impossible to do it, is Millennium Park. From and idea of Richard M. Daley, the construction how it is today started in 1998 and ended in 2004. It is a lively popolated almost the centre of the pubblic life of the city.

Among the most famous nowadays architectsthere are also some who dare too much to be appreciated today. Maybe also for tomorrow.