One Tennessee resident found this remarkable coin collection in a safe stowed away in her attic.

Another man found love letters addressed from a WWI soldier hidden in his wall.

Someone else found over 4,000 century-old game pieces underneath their floorboards.

Another person discovered this life-sized Monopoly game board while redoing their floors.

This person found an old briefcase containing money, silver, video tapes and an incredibly eerie letter that read "Save Yourself."

This old comic book was found by homeowners in one of their walls, then sold at an auction for nearly $175,000.

One couple discovered this 50-year-old safe also hidden in their walls. It contained $51,000 in cash, a vintage bottle of bourbon, and a book titled "A Guide for the Perplexed" by E.F. Schumacher.

One Utah resident found a number of trash bags full of money in his basement and allegedly returned them to their rightful owner.

This person found a rare, old Russian doll in their house and reportedly ended up selling it at an auction for several million dollars.

One man found loads of heavy artillery, ammunition, and grenades in a secret cubby in his basement.

One person found a jar of 40-year-old peanut butter in their attic.

Another homeowner discovered an entire "servant's kitchen" in a portion of their basement.

In Norway, one person found an unsigned Van Gogh in their attic.

This couple found a medieval well just beneath their floorboards.

And this family - they amazingly found these ancient Mayan murals and etchings beneath their home.