Preserving Rarities

1. 
   
2. Day 1
3. 
   
4. Accept Preserving Rarities (that's this quest here) from [npc=206864].
5. 
   
6. Talk to him again and receive a [item=208054]. Open it and get A Clue: The Golden Chalice and [item=208056]
7. 
   
8. Talk to [npc=207696] sitting nearby and ask "Do you recognize this chalice?"
9. 
   
10. Head for the bank in Valdrakken and find [object=405295] on the left hand side as you enter
11. 
    
12. Get back to [npc=206864] complete Preserving Rarities
13. 
    
14. Day 2
15. 
    
16. Turn in Rise in Relic Theft and receive [item=207105].
17. 
    
18. Go to Elder Poa, give him the spear and receive [item=207580]
19. 
    
20. Go to [npc=26194] and receive [item=208190]
21. 
    
22. Fly west to the Berean Tundra and click on the spot to place your [item=207580] and get the achievement The Inquisitive. /way #114 33.63 58.45
23. 
    

For further guidance I recommend https://www.wowhead.com/guide/world-events/secrets-of-azeroth - go there and see how this continues :-)

/way #2112 47.33 48.23 2. Preservationist Kathos
/way #2112 47.97 46.82 4. Bobby Carlisle
/way #2112 58.88 54.09 5. Golden Chalice in Bank
/way #2024 12.4 49.2 9. Elder Poa
/way #115 48.0 74.8 10. Elder Ko'nani
/way #114 33.63 58.45 11. Spot for Spear Next to the Statue

Picking up The Preservationists before this is optional, it's just supposed to make you aware of this quest chain.

The golden chalice gets placed right inside to the left within the bank in Valdrakken.

After completing the achievement don't leave until you kill the Crazed Looter that spawns once you place the spear, otherwise you leave 200g in gold behind.