It was opened in May 2009 after seven years of construction.

It opened on March 16, 1996 after nearly three years under construction.

The canal opened in 1810 after 16 years of construction.

The park was opened on 30 April 2004 after 3 years of development.

It was opened in 2007 after many years of controversy.

It was opened to the public in 1912 after ten years of its discovery.

It opened in 1998, after nearly 20 years of work.

The stage was opened in 2005 after four years of planning and development.

The system was opened to the general public on 2 August 1982 after 27 years of planning.

It was opened in 1866 after three years of construction.