But these entrances were never opened, and remained locked for more than 50 years.

The main entrance was opened in the summer of 2005.

A new entrance to the zoo was opened on 9 November 2010.

A newly designed entrance and gift shop were opened in the summer of 2007.

The stairs were built so that an additional entrance could be opened if needed in the future, and had never been used by passengers.

It served as the main entrance and its first floor is opened by a loggia.

Here an entrance had been opened and a tunnel cut into the soft rock.

The lower entrance to the cave was opened in 1932.

On 22 September 2006, a new entrance to the school was opened.

On Sunday, the main entrance to the base was opened for the public to pay its respects.