Romania has the second largest building in the world after the Pentagon.
No visit to London would be complete without spending some time in Trafalgar Square.
Opened in July 2002, this unusually shaped building stands on the south bank of the River Thames near Tower Bridge.
Known also as "Temple of the Holy Family", it is considered to be the master-work of renowned Catalan architect Antoni Gaudí. It is a bold project, which became one of Spain's main attractions.
Crossing the Thames in London, this is a pedestrian street only, linking Bankside with the city.
Hidden between the tall buildings in the centre of Bucharest, this small church was built by a Greek monk and it is regarded by art historians as a synthesis, on a small scale, of Brâncoveanu architecture and decoration.
It's considered to be one of the most beautiful in the world, because of its elegant British style.
The castle dates from the 14th century and according to legends, it is one of the most haunted castles in Britain.
Built in 1068, it played an important role in the history of the United Kingdon.
Known as Lisbon Castle in the beginning, it later became Castelo de Sao Jorge, after King Joao I.
This is without a doubt one of the most remarkable Renaissance castles in France. Everyone agrees that it is the most impressive and majestic.
On the Isle of Arran, a mile outside the main town, stands Brodick, a red sandstone castle.
A spiraled apartment building hosting as many trees as human occupants. It is a loud testament to Hundertwasser's fear of straight lines.
Casa Mila or La Pedrera, as it is often called, is Gaudi's second most popular building. It is also his last work before dedicating his life to the construction of the Sagrada Familia.
This building in Copenhagen, Denmark is an apartment block made up of V and M shapes. The blocks are formed to allow the same daylight, privacy and views for all apartments.
This strange architectural experiment, wasting living space, should definitely be in your "to see" list when visiting Rotterdam.
