Lego collectors from around the world are especially fond of collecting Lego buildings, some are original Lego sets and some are amazing MOCs they created on their own.
I personally really like the theme of the house building, especially the modular ones that come together in one big city.
I invite you to view some particularly impressive cities that I have found across the web

And of course you welcome to see the models I built:

Modular Building

 

Modular City

 

Desert Village Moc

 

Ruined City MOC

 

Las Vegas

 

Village

 

 

Lego city moc 2 Michigan Lego Train Club Display at the 2008 LibertyFest, Canton, Michigan LEGO Shop Displays Spidey - Back Buildings NMRA 2005 National Train Show - COLTC Awesome creations by others - BrickFair NJ '14 castor city Park 2 Lego pianist in the city LEGO Christmas Village and Snow Resort 2017 BrickCon 2018 Lego Town Scooter Shop 015 Tysons Corner LEGO Store display castor city street 4 castor city Historic 1 Favela 18 IMG_20140803_101041_770 Brisbricks LEGO Fan Expo, Chandler 2017 LEGO City with Detroit Buildings at NMRA National Train Show 2007 01 LEGOWorld Utrecht 2018 MichLTC LEGO City at NMRA 2007 National Train Show, Detroit, Michigan BrickCon 2014 LEGO Pompeii