Stops between Bangkok and Nong Khai railway?

Me and my wife are traveling from Bangkok to Laos in November on the railway connecting BKK and Nong Khai. Ideally hoping to make a few overnight stops to experience some more of Thailand.

Any picturesque towns, historical sights, good hiking, nature or amazing food? We don't mind some more rural villages, but cities also works. Would love to get a feel for the region.

Full list of stations on the line,

Sam Sen
Bang Sue Junction
Bangkok (Krung Thep Aphiwat)
Don Muang
Rangsit
Bang Pa-in
Ayutthaya
Ban Phachi Junction
Nong Kuai
Saraburi
Kaeng Khoi Junction
Kaeng Sue Ten
Talat Lam Narai
Bamnet Narong
Chatturat
Ban Luam
Map Kabao
Pha Sadet
Muak Lek
Pak Chong
Sikhiu
Sung Noen
Kut Chik
Khok Kruat
Nakhon Ratchasima
Thanon Chira Junction
Non Sung
Muang Khong
Bua Yai Junction
Nong Bua Lai
Muang Phon
Ban Phai
Khon Kaen
Nam Phong
Khao Suan Kwang
Non Sa-at
Kumphawapi
Huai Sam Phat
Udon Thani
Nong Khai
Chakkarat
Huai Thalaeng
Lam Plai Mat
Buri Ram
Krasang
Lam Chi
Surin
Sikhoraphum
Samrong Thap
Uthumphon Phisai
Si Sa Ket
Kanthararom
Ubon Ratchathani