At 19 there are still green^^ mobs in Antonica. I'd also second the Stormhold suggestion. Heck you can get 10% or more exp just sneaking around in there without fighting a mob.
Go see the lady by the trader hut on the Qeynos Highway east of the two towers. She wants you to find the Atrium in Stormhold. Speak to the dwarf out front of the hut and he wants you to find the Forge.
Then find the path up into the hills by the Cavepaw tunnel and speak to the guy standing under a tree near the Tower of Vhalen. He wants you to find the library.
Go to stormhold and talk to the fellow at the entrance. He needs you to find three artefacts in the Library, Chapel and Armory. 4 quests and the exp is serious on the Library one.
Groups in Stormhold tend to be decent exp as is VS at your level.
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Wherever I go - there I am.