Dude, do a little research - There's tons to see in Greece and Portugal - Cradle of Western Civilization and all (for Greece) and Age of Discovery for Portugal.
Budapest is a city but it's really popular right now due to how inexpensive it is, the culture, architecture, and the nightlife. Montenegro has gorgeous coastline, like a cheaper Croatia.
Everywhere in Europe is perfectly safe except for Eastern Ukraine and perhaps some suburbs in Paris.
The only
Original 7 Wonder you are going to see intact is the Pyramids of Giza. The rest are in ruins/completely gone and quite a few are in Greece/Turkey (Colossus of Rhodes, Statue of Zeus) - but there's nothing remaining really to see. You also might want to consider Turkey. Beautiful country full of Greco-Roman Ruins and gorgeous coastline. Just a bit dicey near the Syrian border.
I just recently finished seeing all
7 New Wonders. Keep in mind this was decided by an online poll so it's completely subjective. There are sights in the world that should have gone on the list but didn't for lack of votes. And some that shouldn't have really been there. If I had to rank them personally by touristic interest (i.e. time you'd need to do them justice) they'd be:
Petra > Machu Picchu > Chichen Itza > Taj Mahal > Great Wall > Colosseum > Christ the Redeemer
What really needs to go there (just off the top of me head):
Angkor Wat, Borobudur, Terracotta Warriors, Hagia Sofia, Ephesus, Acropolis, Alhambra, Teotihuacan, St. Basil's