In Tomb Raider 3, Lara heads to a coastal village somewhere in the South Pacific, you start the level underwater and there you'll find the Smuggler's Key sitting at the bottom of the lagoon - you'll need it to go through the Smuggler's Hut.
Saschacraft extracted an interesting 3D model from the Tomb Raider game, this particular one is when Lara Croft gets hit by or drops on floor spikes (i think?)
Halfway through Tomb Raider 3: Adventures of Lara Croft, Lara ends up in the South Pacific trying to reach a coastal village, along the way, she encounters these native tribesmen armed with poison darts.
Here's the Panther that appears in the Egypt level (City of Khamoon) in the original Tomb Raider video game. Hey Mr. Panther, nice set of chompers you got there ^^, smile!
From Tomb Raider: Legend, you can find this gold artifact in level 2 - Peru "Return to Paraiso" - inside the ruins you'll have to solve a simple ball puzzle that makes use of pressure plates and movable balls/boulders to get this item.
The Seraph is an artifact from the Tomb Raider 2 video game (Barkhang Monastery), Lara retrieved it to gain access to a key that gives you access to the Dagger of Xian ^^
On Tomb Raider: Legend, Lara has a handy PDA that keeps track of her inventory, number of secrets she has found / not found, and info. on current location and objective.
And this minecart with a big drill attached to it is from the original Tomb Raider video game, you'll see it at the early parts of Natla's Mines and it'll help you get through some barriers.
You'll find this gold, mace-looking artifact in the Nepal stage (The Ghalali Key) of Tomb Raider: Legend. There's only one of it in that stage and you'll have to do some mountain climbing and ledge shimmying to reach it.
In the game, you can find this item when you explore the Tomb of Seth in Egypt (looking for the Amulet of Horus), you'll see it on top of a receptacle in one of the chambers.
The gorilla that appeared in the original Tomb Raider video game. They are fast moving enemies that can climb on to low blocks and can take quite a long time to kill. They first appear in St. Francis Folly and continue to show up until the end of Tomb of Tihocan.