Monuments
This is a set of customizable scenic props that I originally made for Unreal, but recently ported to Unity. Everything was modeled in Maya and textured in Substance Painter.
You can find the Unity pack here: https://assetstore.unity.com/packages/3d/props/monuments-and-obelisks-110473
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Also, the Unreal version here: https://www.unrealengine.com/marketplace/monuments-and-obelisks
A few demo scenes that I made in Unity
Not exactly "monuments" but they can make for some fun scene filler up close or in the distance.