Dota 2 shrines have been removed from the game in the 7.24 update. Like most updates, Valve is heavily focuses on heroes and items with a few core gameplay changes, but that changed in this last patch.
Alongside the balances to the game, Valve removed shrines and gave heroes a dedicated neutral items slot. Only a maximum of one neutral item can be equipped on your hero.
Dota 2 Shrines: Valve Removes Shrines in 7.24 Update
Shrines were a regenerative structure and could be directly teleported on. They were located near Roshan and gave players a place to teleport and defend Roshan. They were invulnerable until a Tier 3 tower was destroyed. If players clicked the shrine, it would generate an aura that would last a few seconds providing health and mana.
But you don't have to worry about them no longer as they have been removed from the game. You can see the full changes to the game here. You'll find information of gold income changes, Courier changes, and even Outposts changes.