Lost Land Passages
There are many routes to get in and out of the Lost Lands (Delucia/Papua) Most of them are worthless and unless you happen to deep in the Lost Lands in Fel, looking for a way out, you will most likely never use 3/4 of these. Passages with a * next to them imply they are useful, while the others are too far out in no mans land to help.
Britain Sewers to Hoppers Bog:* Goes from the Britain Sewers (Accessed near the Brit Inn) to East of Papua.
Delucia Passage: Goes from the Trinsic Caves (Accessed via a cave at the bottom of the mountain near Trinsic) to Delucia or the Undead City/Savage Camp to the North of Del.
Vesper Cemetery Passage:* Goes from Vesper Cemetary (one of the houses has a basement/tunnel) to the middle of the Lower Lost Lands. Papua is a straight shot north.
Marble Island Passage:* 'Goes from Marble Isle to directly West of Tera Keep.
Moonglow to Papua Mage Shops:* Speaking Recdu/Recsu will bring you from shop to shop
Fire to Sak Teb: Goes from Fire Dungeon to the Desert in the Lost Lands.
Ice to Kos Heb West: Goes from Ice Dungeon to the North Tundras of the Lost Lands
Minoc North Mines Passage: Goes from the Caves near Minoc to Hoppers Bog (the same swamp the Brit Sewers takes you to)
Serpent Pillars:* Speaking Doracron/Sueacron will bring you from pillar to pillar
Temple Island to Delucia Temple:* Brings you from an Island nearby Serpents Hold/at the Bottom end of Britannica to a spot East of Delucia
Yew Prison to Lighthouse: Coolest passage way, most useless however. Brings you from Yew Prison to the Lighthouse in the Desert in the Lost Lands.
There are only a few places you would want to go to in the Fel Lost Lands.
-Tera Keep Champ: Closest passage is Marble Isle. Alternative options are: Vesper GY, Britain Sewers, Papua Mage shop.
-Khaldun: I'm just going to save you time and tell you there is nothing here. Britain passage is closest, but really. Don't go, it is not worth it.
If you are sneaky/smart about it, you can use some of these passages to check champ spawns very efficiently. The best way to check champs is to run a circuit, check a few in a row in an optimal manner.