Looking to discover some of England's history? Sprawling Windsor Castle has 1000 years behind it as a royal residence and visitors can explore the Royal Collection of artwork, the opulent State Rooms, St George's Chapel and more.
It's located in the English county of Berkshire and is easy to reach by car or by train from London Waterloo or London Paddington.
The Clerigos Church is a baroque building designed by the architect Nicolau Nasoni. With its famous tower, it's a well-known architectural ensemble in the city of Porto.
Located on the grounds of the imperial summer palace, Tiergarten Schönbrunn (Vienna Zoo) is the oldest zoo in the world - and yet still frequently voted one of the world's best. The zoo was founded as an imperial menagerie in 1752, by the then Holy Roman Emperor, Francis I. It was opened to the public in 1779. The Tiergarten has an amazing array of animals (more than 700 species in all).