For a great view of the city (especially at night) go to the top of the Eiffel Tower at Paris. It also offers a great vantage point for viewing the water show at the Bellagio.

cdm115 Article on Las Vegas Casinos

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

A hike to the top of Yosemite Falls is among the best the park has to offer.

ankopsu Article on Yosemite National Park