Be wary of gladiators outside the colosseum. They don't take photos for free and can be quite agressive about their payment. Also don't be fooled into taking an unlicensed guided tour of the Colosseum either....

MJ Article on Colosseum

I went alone last summer (06). I met some wonderful people…I liked it so much, that I am going on the London + Paris trip next week (alone again).

Liza_peral Article on Travelling alone

My best advice is to step outside your comfort zone and make an effort to talk to EVERYONE on tour. I made friends from 6 continents on the one tour!!!

Melsie Article on What are the groups like?