Here's a few ideas, in no particular order:
If you have access to some older LV downtown postcards, it's fun to walk the several blocks of the Fremont St. Experience and compare what was once there. Use the old postcards for orientation.(LMK if you need some scans of a few postcards & I'll send them to you.)

Starting at the Plaza... it was once the site of the train station. Became the UNION Plaza (with its connection to Union Pacific RR); now back to the Plaza. One of my favorite photos is when the currently-domed Center Stage restaurant was once an open-air pool, overlooking Fremont St. (I've posted the photo before, but can send it to you if you want.)

Of course, the Golden Gate is one of the oldest buildings downtown. Used to be the Sal Sagev (Las Vegas backwards) Hotel. Across the street, the Las Vegas Club has grown and changed over the years. The "stadium" themed facade used to be different, and in fact, the Las Vegas Club was originally on the opposite side of the street. See old photos for reference.

The site of the Coin Castle slots-casino (recently remodeled and changed names?) is the site of the Northern Club, the first club to obtain a gambling liscense in LV after Nevada legalized it in 1931. (There's a copy of the original licsense in the Trop museum, I think. Speaking of which, the reporter might enjoy a trip to see the museum.)

The Golden Nugget has taken the entire block now, and facade is nothing like its original with signs on the corner. The California Club and many others have been swallowed up in past years. And in more recent history, the Golden Nugget was the casino that Steve Wynn used to launch his meteoric rise in the gaming industry, before he opened the GN in Atlantic City, then the Mirage, then... you know the rest.

Horseshoe also the entire block now. Originally was just half the block. Started out as the Rex, and the Apache Hotel above. Horseshoe history ties to Benny Binion, of course, including the time it was Joe Brown's Horseshoe when Benny was a "guest" of the Federal gov't for a few years. Of course, the Mint and Bird Cage are long gone.

The Fremont Hotel & Casino was the tallest building in Nevada when it was originally built -- all 15 stories, with a rooftop swimming pool -- in 1956. Note how the rooms & windows are staggered with each story, the way you would stagger cinderblocks if building a wall. This modular construction was a novel idea when it was built.

The El Cortez has one part of the building that's original and still standing. Very evident when viewed from the street. Jackie Gaughan runs it now, of course, but the El Cortez has ties back to Bugsy Siegel and "the boys". For instance, in the Wilkerson book, "The Man Who Invented Las Vegas", page 74, is this quote about the El Cortez: [Moe] Sedway... remained behind in Las Vegas to establish a race wire service. Soon, he was running the El Cortez Hotel with Arizona bookmaker Gus Greenbaum for a syndicate of investors which included, among others, Siegel and Lansky."

For more info on Jackie Gaughan, see book "The Player: The Men Who Made Las Vegas" --chapter 9. Also has chapter on Benny Binion.

Another book to suggest is "Fabulous Las Vegas in the 50's" by Basten & Phoenix. Has lots of older photos.

In fact, if this reporter has an expense account, you might want to refer him to the Gambler's Book Club / Store on 11th Street for some of the reference books.

I could go on & on, but you get the idea. Ain't LV history great!

LMK if you want some postcard scans.