Hey guys, how do you get your park value up for the scenarios that require high park values? I'm working on Diamond Heights at the moment and failed it the last time I played it. I way prefer the guest number and rating scenarios but these ones have to be done!

Building rides is the most direct route. The park value is largely composed of the sum of the cost of all the rides and attractions in your park, so if you focus on constructing new rides (while attracting more guests to your park), you should be on (coaster) track to reach the necessary park value before the deadline. You can also experiment with park value using the scenarios that require you to repay your loan and reach a minimum park value - these have the same general objective but give you unlimited time.

RCT Fandom explains how park value is calculated and what other factors go into it other than ride value.

A few tricks from Marcel Vos (reddit) to increase park value that probably work.