Ang mga tunnels at tulay ay gumawa ng mga kalsada upang lumipat nang mahusay sa pagitan ng dalawang lokasyon.
© Chloroformzt Official - Est 2009
10 Kawili-wiling Katotohanan About The physics and engineering behind bridges and tunnels

10 Kawili-wiling Katotohanan About The physics and engineering behind bridges and tunnels