A bridge usually gets people to the other side safely.
But not for some people - and even animals - who have to do balancing acts as they make their way to safety. Dangerous crossings are definitely not for the faint-hearted or those suffering from vertigo.
Especially in places where bridges are rickety-old and worn out, and in need of urgent fixing or demolition. Like the old San Francisco-Oakland Bay Bridge, which is being taken down in stages.
At some connecting spots like a steep vehicle bridge in Ejima in Japan, motorists have to muster full control as they steer their cars especially when they go downhill. Otherwise a nasty pile-up might result.
But many bridges have been engineered and designed with international standards of safety. And they look beyond mere solid structures of function.
The ones with new-fangled designs include the illuminated double-helix bridge at Singapore's Marina Bay and skywalk at Gardens By The Bay - which was used as an elevated catwalk in the air for a fashion show.
Who says a bridge can't be cool?