The top end of Collins St (aka the 'Paris end') is lined with plane trees, grand buildings and luxe boutiques, giving it its moniker. The Block Arcade , which runs between Collins and Elizabeth Sts, was built in 1891 and features etched-glass ceilings and mosaic floors. Doing 'the Block' (walking around the block) was a popular pastime in 19th-century Melbourne, as it was the place to shop and be seen.