With deliberate steps, visitors can catch up to a pair of robots, the last realistic characters they will see.
San Francisco International (www.flysfo.com) goes a digital step further: visitors can click on an interactive map of the Bay Area, to find out, say, which door-to-door van services go to Berkeley.
The force went on to list steps that visitors to London should follow to keep themselves and their belongings safe, including not carrying large sums of cash in public, using hotel safes, and always travelling by licensed taxi or minicab.
Boardwalks and steps enable visitors to reach the beach on foot without harming the dunes, and horse riders and naturists are asked to stay on the beach and keep off the dunes.
Taking five years to complete and coming into operation in 1988, beach access is now via a series of raised steps for visitors, with three vehicle access points which can be closed during storms using sealed gates.
The new exhibition would go on to describe the process of extermination, leading visitors step by step through what victims experienced, and end with a section on camp life, meaning the "daily dehumanization and attempts to keep one's humanity," said Piotr Cywinski, the bearish, red-bearded 39-year-old Polish director of the Auschwitz-Birkenau State Museum. Auschwitz-Birkenau State Museum
A booth manned by the religious police ensures that no visitors step out of line.
As visitors step into the first of several long exhibition rooms, this is made abundantly clear.
In the interactive exhibit "Forced from Home," visitors step into the role of refugees.
In the Guggenheim installation, canisters release the scent as visitors step into the main gallery.
