Almost all of Southern Armenia's visitors head down the highway from Yerevan. You can also enter from the Lake Sevan Region, or from Iran. Depending on your budget and your plans, you can enter by tour van, private taxi/van, shared taxi, rent a car, or take public transport - either a bus or a van marshutni that's heading to or past a town you want to get to. You can also try hitching. It's not as popular as it used to be, but it's still perfectly acceptable though unaccompanied girls might find themselves getting more attention than they'd like. The only major town not on the North-South highway is Jermuk, so catching a bus or van going directly there is your best bet, unless you really do want to hitchhike or try and find a cab in one of the towns along the highway. Public transport is cheap, and often crowded. Have some smaller change on you and ask a fellow passenger the fare to have it ready.