To your left, a rolly stuffed with three too many tees and all your ten-ounce moisturizers. To your right, an encyclopedic tome on Venice, Florence, and Rome.

It seemed like an easy decision at the time. Only now you’re staring at the huge dome looming overhead in Piazza del Duomo and wishing you had remembered to pack a clue.

Next time, stop by iJourneys.com before you leave to download an MP3 walking tour. Then, once you’re at your destination, you can cruise the cobbled streets at your own pace (tours last about an hour and a half and hit all the important spots), pausing for as many prosciutto panini as you want.

There are tours available for Venice, Florence, Rome, Pompeii, Barcelona, Salzburg, Vienna, and Paris — all narrated by Elyse Weiner, an Emmy-winning news producer who covers everything from assassination spots to ice cream parlors in vivid (and memorable) detail.

So she’s a little on the earnest side.

But she totally pulls her weight.

Available online at ijourneys.com.