Roald Dahl Plass

Roald Dahl Plass was a part of Cardiff Bay.

History
In 2006, the TARDIS landed there, above the Torchwood Three base. (DW: Boom Town) The perceptual filter of the TARDIS, created a spot of perpetual perceptual blindness, enabling Torchwood to set up an "invisible lift" without anyone noticing it. (TW: Everything Changes) In 2008, the TARDIS landed near the same spot, enabling Jack Harkness to jump onto it just before it dematerialised. (DW: Utopia) In 2009, the British government bombed the Hub from inside, devastating Roald Dahl Plass. (TW: Children of Earth: Day One)

Behind the Scenes
In real life, the fact that Doctor Who and Torchwood have so prominently featured the Plass has made it a popular destination for fans visiting Cardiff.