Rakotz Bridge in Kromlau, Germany. (Photo source: huanqiu.com)

Langkawi Sky Bridge,Malaysia. (Photo source: huanqiu.com)

Shaharah Stone Bridge,Yemen. (Photo source: huanqiu.com)

Bridges of tree roots,India. (Photo source: huanqiu.com)

The sunken bridge at Fort de Roovere,Netherlands. (Photo source: huanqiu.com)

London Rolling Bridge,UK. (Photo source: huanqiu.com)