World War I

This neatly maintained cemetery honors the sacrifice of the brave soldiers who laid down their lives during World War I and World War II.

A neighborhood of houses made of poured cement through a process invented by Thomas Edison.

A seaside cemetery honors the Commonwealth soldiers and sailors that died in Sierra Leone during World War I and II.

This abandoned but well-preserved Prussian fortress sits abandoned in a Polish forest near the German border.

In 1914, Archduke Franz Ferdinand spent his final night alive at this luxurious hotel.

The ghostly remains of a gunpowder mill lost in 70 hectares of thick woods.

A statue built to honor the elite soldiers who fought for Latvia during World War I.

A war memorial that appears to ascend from its forested setting.

The haunting remains of a World War I fort perched atop a mountain.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

One of the world's largest swinging bells is a symbol made from the melted aftermath of war.

Artifacts from a battleship sunk at Pearl Harbor displayed in the Capitol building of its namesake.