There are some fine ressources for finding out where some of the stuff in Metro is.
First of all, *metropolis* region (name includes the asterisks) is a good start.
There you will find several resources:
A book on the counter (next to charming Bertha) gives out folders containing LMs for sightseeing and shopping in Metro (just click the respective page of the book).
On the same level on *metropolis* region there are two super convenient systems that get you to great places:
1) watch out for the box that says "Grid Teleport Center". Just run into it and it will take you one level below where you will find lots of recommended places that can be targeted from there. Also, there is a box where LMs can be dropped.
2) right next to the box you find the MRTPS - the Metropolis Teleport System. The vendor gives out a HUD. This is the most up to date and complete overview of regions in Metropolis, supplemented with further info about events and stuff.
Finally there is the Weltraumbahnhof (Space Station):
Though this region is not online 24/7, it is very convenient to walk around and see a huge number of teleporters with additional information about the destinations. The Weltraumbahnhof provides an awesome collection of destinations.