Thousands of tourists flock to the castle each year.
  Times, Sunday Times (2012)
 Tourists flock to Britain's world-class museums and theatres.
  Times, Sunday Times (2011)
In the shadow of Lisbon's Moorish castle, where tourists flock to take selfies on the ramparts, a green door on a cobbled street opens into a small drop-in centre.
  Times, Sunday Times (2015)