CN Tower
Niagara Falls
Golden Gate
Mt. Fuji
Great Wall
Grand Canyon
Hoover Dam
Pyramids
Petra
Colosseum
Leaning Tower
Parthenon
Stonehenge
Big Ben
The Chunnel
Eiffel Tower
Mt. St.Michel
Empire St Bld

Alaska glacier
Tokyo Tower
Forbidden City
Sum'r Palace
LaBufadora
Bilbao Museo
BlarneyStone
Disney Paris

City Ratings
Here's a quick review of some of the major cities, ranked alphabetically.
 - Paris ranks at the best city overall thanks to its ambiance, attractions, affordability and nice weather
(Language note: T-Eng. = people in tourism industry (hotels, cabs, restaurants, attractions) speak English, while only a few in the general public speak English).

City Language	Ambiance (1 each for: walkability, cafes, shopping, parks, clean)	Attractions (1 = 1 day of attractions, at moderate 2-3 per day)	Safety Watch out for:	Cost 3 hotel, avg food, sights $ ~$30/day	Weather	OVERALL (out of 5)
Athens Greek, T-Eng.	(Plaka) (away f. Plaka)		Wandering dogs, getting lost in Plaka	$$
Barcelona Spanish, T-Eng			Pickpockets	$$$
Beijing Chinese			crazy bikes, pollution that will make you spit	$
Cairo Arabic, T-Eng			Hustlers, mule carts, heat, pickpockets, crazy drivers	$
Dublin English, Irish				$$$
Edinburgh English				$$$
Florence Italian, T-Eng				$$$
Oslo Norweign, Eng				$$$$$$
Ibiza Spanish, T-Eng			Sunburn	$$$
L.A. English			Rollerbladers, traffic	$$$$
London English			Tube pickpockets, rain	$$$$$$
Munich German, Eng				$$$
New York English			Pickpockets, muggy weather, crazy taxis	$$$$$$
Paris French, T-Eng			Metro pickpockets, rollerbladers	$$$$
Prague Czech, German, T-Eng			Dog crap	$$
Rome Italian, T-Eng			Pickpockets, mopeds, drivers	$$$
San Fran English			Fog, crazy cable cars	$$$$$
Santorini Greek, T-Eng			Mule crap on trails down to the ports	$$$
Stockholm Swedish, Eng				$$$$
Tangier (Morocco) Arabic, T-Eng			Hustlers, pickpockets crazy drivers	$
Tokyo Japanese			Mobs of shoppers	$$$$$
Toronto Swedish, Eng				$$$$
Venice Italian, T-Eng			Getting lost	$$$

Comments:

• Ambiance: Italian cities (Rome, Venice, Florence) and U.S. cities (LA, NY) are all missing parks spread throughout the city, so they don't get a Park.   London and LA aren't walkable (require the Tube or a car to really see the city), so they lose a Walkability  
• Attractions: includes ruins, museums, towers, castles, tombs, cathedrals, bridges, beaches, zoos
• Cost: This is tourist-on-a-budget costs, not living costs.  For example: while LA has high living costs (high rent, car, car insurance), its tourist costs are reasonable (free beaches, free attractions like walking around Hollywood, free Getty museum, and cheap fast food.  etc.)
• OVERALL:  Cities with $$$$$$ or (New York, London) loose an Overall