Kintaikyo Bridge, an undulating bridge in Iwakuni city.

If you visit Hiroshima and Miyajima, think about further step to Iwakuni-city just one hour from down town Hiroshima city.

Hiroshima bus center to Kintaikyo (1700 JPY Round trip for adult, Nov 13 2019)
Iwakuni bus website (Japanese only)

The Kintaikyo bridge is know for its unique undulating shape and made by wood of course you can walk through
(310JPY for round fee for adult)
Kintaikyo Bridge Website (English)

On top of neighbor hill, there is Iwakuni castle, you can go there take aireal tramway. (560 JPY, Round trip for adults, Nov.13 2019)

Iwakuni city Official website (Machine translation in English)