Trench Warfare at the U.S. Capital

FALLOUT 3:  The National Mall, or what's left of it.  Now it's a war zone, where the Brotherhood are fighting off Super Mutants.  After clearing out the area, feel free to take a tour of some of the fantastic museums and learn a bit of American History, maybe.

An Alien Crash Site, Abducted, a 200 year old child named Sally, and plenty of Alien Weapons

FALLOUT 3:  Ah yes, nothing like walking across the wasteland only to encounter a downed alien spacecraft where I am subsequently beamed up onto their ship and given a bit of the ol' probe.  Thankfully, these aliens aren't all that smart and I was able to break out of my captivity with the help of a couple other abductees.

Passing through the quiet Arlington Cemetery

FALLOUT 3:  Arlington Cemetery, one of the few places in the wasteland where there is something that has a green color.  Everything else is ash. 

Megaton is The BOMB!

FALLOUT 3:  Megaton. You have the option to blow this place up but I decided against it because one day, perhaps, this place can transform itself into a thriving, peaceful, well-adjusted community.  Maybe it can become a beacon of hope and stability in the otherwise unforgiving, ruthless Wastelands. Either that or maybe one day a few well armed, psycho addicted raiders will break in through gates and murder everyone. What will become of Megaton?

Have you been to Vault 106?

FALLOUT 3:  Vault 106, if you have to make a pit stop or need to hide from wasteland raiders, this place could offer you some temporary shelter.  In fact, it is so nice you should just stay a while.  Become a permanent resident.

The most fucked up school I've ever encountered

FALLOUT 3: The Springvale School.  Hive of cannibals, raiders and all around nasty individuals.  Take a gun, or several, if you choose to enter.