Tough question.

The single most interesting Place I have ever been to is Machu Picchu in Peru. However I haven't been everywhere yet.

Machu Picchu was the highlight of all my travels so far and will be very hard to top.

Andre

Machu Picchu Photos 

Well that is a hard question for me. I really love to travel and enjoy most of the places I visit. So everplace is great to me.

Well if you want to do some adventure than you can visit either South American country like Brazil, Peru  or you can visit some African nations too. You can also use South Asian country too.

Hi friends...

In world , there are many best places to be visit.

 Each place has its own attractions and importance. You can find the place as per your interest with the help of internet. You can find all the information as you want................

I think China would be a very good place to visit. I can suggest going to both Beijing and Shanghai there are a lot of good tourist spots in both cities. 

you can visit Khatmandu. its a heavenly place.

I think you should to the 8 wonders of the world trip. See the 8 wonders

I think u have to visit the INDIA for 1 time . IF u can vist the
India then u can know hows beautiful INDIA, because in INDIA there are
lots of places in INDIA for visiting  like....

GOA,AGRA,SHIMLA,NAINITAL,RAJASHAN,JAIPUR,UDAIPUR,RED FORT IN DELHI...................... 

 Punishat lehry

http://www.indiandiscovery.com/