The tower is a bit like the moon - you see it every day but can't get to it.

BBC: Tower of Refuge walk 'attracts thousands'

Currently, a Nave is on display at the Daros Foundation in Zurich, and walking through it is like floating: you lose your bearings and move in slow motion, as though doing a moon walk.

ECONOMIST: Brazilian art

Is it something you'd like to do or is it going to suffer from budget cuts to pay for missions to the moon and further to Mars?

NPR: Revisiting the Viking Missions to Mars