How do you get Those Were the Days in Minecraft?

Travel to the Nether and explore any biome except Basalt Deltas: Bastion Remnants never generate there. They are huge blackstone structures, visible from far away.

What kind of advancement is Those Were the Days?

Those Were the Days is a Nether tab advancement in Java Edition.

Those Were the Days

Tab: NetherDifficulty: Easy

Quick answer: Enter a Bastion Remnant

Tree path: Nether › Those Were the Days (advancements are independent: they can be completed in any order; the tree only guides progression)

Tree parent: Nether

Advancements are exclusive to Java Edition. The Bedrock Edition equivalent is achievements, which have different objectives.

How to get Those Were the Days

Travel to the Nether and explore any biome except Basalt Deltas: Bastion Remnants never generate there. They are huge blackstone structures, visible from far away.
Equip at least one piece of gold armor before approaching: Piglins attack players without gold on sight.
Walk inside the bastion's bounding box: the advancement triggers on entry.

Tips

There are four bastion types (bridge, hoglin stables, housing units and treasure room). The treasure room type has the best loot, including a chance of Netherite Upgrade smithing templates, but also the most Piglin Brutes, which are always hostile regardless of gold armor.

Advancements this unlocks

War Pigs

More guides from this tab (Nether): Nether Return to Sender Hidden in the Depths Subspace Bubble A Terrible Fortress Who is Cutting Onions?