A few years back I did our lower level in 5" American cherry hand scraped finish. This is an engineered wood product. It was spendy - like $9 sq/ft just for the material. I used Bostic's best glue which was also spendy at $250/5gal. You get what you pay for. The floors are thick and can be refinished several times though alot of sanding will remove the hand scraped look. I took some time off of work to do the job. Took me about a 1 week working 6-8 hr days - tough on a then 44 yr old back but I enjoy doing home stuff like this.
Main hallway
Kitchen
Entry way - I spent a day coming up with a custom tile insert and used a combination of tiles that I used on the fireplace, wine cellar, and 1/2 bath. If I could do it again I'd spend more time to come up with something more dramatic but it works. Better than a entry rug I guess...