US, CA & CZ

I've got these 3 official cards this week, all in the same day.

US-475082, sent by Mandy.
This card is from Chicago with the Wrigley Building and Tribute Tower, skycrapers from the 20's.

CA-71375, sent by Anna.

Edmonton skyline. Edmonton is the capital of the province of Alberta.

CZ-32252, sent by Milan.

"Karlštejn Castle is a large Gothic castle founded 1348 AD by Charles IV, Holy Roman Emperor-elect and King of Bohemia. The castle served as a place for safekeeping the Imperial Regalia as well as the Bohemian coronation jewels, holy relics and other royal treasures. Located about 30 km southwest of Prague above the village named Karlštejn, it is one of the most famous and most frequently visited castles in the Czech Republic." - in: wikipedia