These Bobbleheads can become unobtainable: Strength, Energy Weapons, Repair and Medicine. There are many videos on youtube to find the locations of the Behemoths.

You have to rescue the Teddy Bear from it's shopping cart prison in order for the Behemoth to spawn.

Jury Station: Go west until you reach a bunch of wrecked train cars.

Takoma Industrial (that's east of the GNR Building, at the end of the map): The Behemoth is just north of the factory.

There will be many Talon Company mercs there fighting it with some heavy weaponry.

The Capitol Building: inside the main room if you look on the map the room is straight down the hall from the West Entrance but because of the debris you have to take an alternate route to the room.

When the generator powering the enclosure is destroyed the Behemoth escapes.

Evergreen Mills at the Raider camp near Vault 112: held in an electric enclosure beside the train tracks.

This will probably happen during the quest 'Galaxy News Radio'.

Galaxy News Radio: the Behemoth will blow up a wall just outside the Galaxy News Radio Building when you approach the building.

Unmarked Brotherhood Outcast shack west of SatCom Array NN-03d. Sold/carried by Caravan Merchant Lucky Harith. Received for completing the 'Blood Ties' quest. Inside the Framed Quote of Revelation 21:6. Sold/carried by caravan merchant Crazy Wolfgang. Received for completing the 'Stealing Independence' quest. Sold by Tulip at Underworld Outfitters in Underworld. Sold/carried by caravan merchant Doc Hoff. Received for completing the 'Nuka-Cola Challenge' quest. The schematics are among a pile of skeletons. The 'Wounded Deathclaw' random encounter.

Received for completing the 'Rivet City Council Seat' quest in favor of Bannon. Located in a trailer guarded by a Deathclaw.

Sold by Michael Masters or Lydia Montenegro at Boutique Le Chic. Quest reward from Hannibal Hamlin, received for completing the 'Head of State' quest. Sold/carried by Knick Knack in Little Lamplight. Alternatively in Dashwood's safe in Tenpenny Tower. Quest reward from Herbert Dashwood, received for completing 'A Manhandled Manservant'. Jocko's Pop & Gas Stop, northwest of Tenpenny Tower and east of Girdershade. Quest reward from Moira in the 'The Wasteland Survival Guide' quest, after the Minefield portion of the quest. Below is a list with the locations of the schematics. However, finding more than three schematics will not give more benefit. Or in the case of explosives the yield will be higher, ie. Finding multiple schematics will increase the starting condition of the weapon. You can find several schematics for the same weapon. The schematic will show you which parts you need. Once you locate a schematic you can view it in your Pip-Boy. To make a custom weapon you first have to find the schematic.

Seward square fallout 3