Military in Sweden

A southern Swedish island is home to the last ERSTA artillery battery, meant to protect the shoreline during the Cold War.

This railroad track was so secretive that it was omitted from all maps.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

This innocuous-looking button may have been used to assassinate a king.

It was meant to help transport wounded soldiers to a secret underground hospital.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

Tucked away in a downtown Stockholm park are the remains of a World War II defense position.

A catapult rock from Gotland’s 13th-century civil war is still lodged in Scandinavia's best-preserved medieval city wall.

The Swedish flag over this small naval fort signals that the nation is at peace.

This abandoned urban warfare facility is a dream come true for airsoft and paintball enthusiasts.

This secret facility trained seals for the Swedish navy during the Second World War.

A former top secret military tunnel is now stuffed with snow and open year-round to skiers.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

A plaque on this tiny Swedish island commemorates an unusual Cold War standoff of Soviet submarine intrigue.