Abandoned in Croatia

Now abandoned, the world's first torpedo factory is crumbling into the sea.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

This abandoned Croatian stronghold never saw a great deal of conflict but it is still a beloved relic nonetheless.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

This huge metal monument is slowly being stripped to its concrete skeleton.

Yugoslavia's biggest underground airport lies in ruins.