Dig site

A dig site is a type of spawner that produces buried rare relics in The Sims 3: World Adventures and The Sims 4: Jungle Adventure.

The Sims 3: World Adventures
There are several kinds of dig sites, and each provides relics unique to a specific location, or otherwise specific in kind. For example, the dig sites in China will only yield Chinese relics. However some dig sites only yield fragments. Players can place dig sites on lots using the testingcheatsenabled true + buydebug cheats. Dig sites can be placed on non-lot terrain in Create a World. With Lifetime Reward like Learned Relic Hunter and the Tear of Horus, dig sites can be easily spotted for excavate collectibles relics.

Bug
If you have Ambitions and Patch 12 installed, you will be unable to dig at a dig site if it's on a slope.