At last, Landmarks. And five of them because why not. There are twenty-one of them so there are still plenty you haven't seen.

Landmarks are landscape-style like Events. You can shuffle them into the randomizer deck, and flip over cards until you have ten kingdom cards, using Events and Landmarks if they show up; if using this method I recommend having a max of two total Landmarks/Events. Or, you can shuffle Landmarks and Events into a separate randomizer deck and just always play with one or two of them. Or whatever else you think of; we like to leave that up to you.
Landmarks change the scoring for the game. Some just change it at the end; some use VP tokens to score during the game. You don't buy Landmarks like you do Events; they just sit there, telling you how you could be making points, if only.
Fountain is a simple one. At the end of the game, if you have 10+ Coppers, you get 15 VP. Bam. If you don't, you don't get anything; if you have 20+ Coppers, sorry, still just 15 VP. Okay? So, you decide: do you want the VP enough to have the Coppers? If you do, you probably don't want the extra Coppers until later, but you don't want to wait until it's too late. Sometimes you may even try to trash your starting Coppers and then buy them back later.
Battlefield is one of several Landmarks that gets 6 VP per player and then doles it out somehow in 2 VP increments. Battlefield gives it out with Victory cards; the first however many Victory cards are worth extra. Should you buy up Estates for the bonus VP, planning to immediately trash them? As usual, it depends on the board.
Wolf Den is a negative Landmark. At the end of the game, each lonely card dings you. For extra fun, pair with attacks that trash cards, or ways to hand out cards to other players. That first Duchy loses a little something.
Tomb works during the game but has no limit, beyond what you're able to trash. There's no guarantee that you can trash cards in a particular game, but that won't come up too often; it spices up trashers, Remodels, one-shots, and some other random cards like Hovel or Knights or Gladiator.
Keep is the area control Landmark. Each kind of Treasure is a little battle, including normal ones like Copper and special ones like Rocks. Whatever else you are doing this game, you would also like to win these battles.