Emperor's Tomb Shortcut
Since the new film was officially announced, I went back to playing the games. First, I played Greatest Adventures, then Instruments of Chaos, and so on... Finally, I played Emperor's Tomb for PS2. After playing around, I found a cool, daring shortcut on the first Black Dragon Fortress level.
When you climb onto the first roofs after the opening cutscene, walk along them to the bamboo platform ahead. The one connected to the roof that you use to lower to the bridge is the one you need to stand on. After doing so, equip the whip. Then, step back, and run forward, jumping off the edge. Just as Indy almost falls off screen, whip forward. You should catch the whipswing post and swing to safety. Although dangerous and pointless, it is fun.
Please post any other secret shortcuts.