Oudegracht 279, 3511 PA Utrecht, Netherlands
A unique landmark, De Letter van Utrecht is an endless poem written in stone on the pavement. Created by the Utrecht's Guild of Poets, the poem is continued each Saturday at 13:00 with a new letter being placed on the pavement.
This means the poem grows by 5 meters each year and every 2-3 years another poet takes over the writing. The first 648 letters were unveiled in 2012.