The Fort Montbarey was initially constructed as a fortified stronghold under the reign of Louis XVI. It's located to the west of Brest and shares similarities with Questel Fort. Brest provided the fort to the Memorial Association to establish a museum focusing on the history of the Finistère region during WWII. The museum is actually one among a series of five forts that collectively narrate the region's history.

The historic Saigon Central Post Office, which has long been one of the city's symbols, continues to offer postal services such as mailing and money exchange to-date. One interesting fact about the Post Office is that it was designed and constructed by the renowned French architect Alexandre Gustave Eiffel, who is best known for the eponymous Eiffel Tower. Eiffel derived artistic inspiration from Western neoclassical architecture and Asian decor styles before harmoniously fusing them during the construction of the Central Post Office.

Founded in 1330 and located on the banks of the Daugava River, the Riga Castle is one of the country's most prominent medieval castles. Throughout its history, it has suffered significant damage and seen various rulers and wars. After numerous reconstructions, it is a typical sample of late Classicism architecture. Currently, it serves as the official residence of the President of Latvia.

The 17th century St Paul's Cathedral on Ludgate Hill is one of the capital's most iconic buildings. Designed by the illustrious Sir Christopher Wren, St Paul's was the tallest building in London until as late as 1962. Use the touchscreen multimedia guides or take a guided tour to learn about the famous interior or, if you're feeling fit, climb up to the Whispering Gallery and try out the acoustics. From there you can carry on making your way up to the Golden Gallery atop the dome, where you'll be rewarded with breathtaking views of London. You can also descend into the crypt where you'll find memorials of important historical figures such as Admiral Lord Nelson.