Seat of the Duke and Duchess of Devonshire for centuries.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

Colorful boxes placed over the dead are left to rot and crumble.