What's the highest price a country charges citizens of another country for tourist visa?

Since last year's unpleasantness, Bahrain has hiked its visa fees way, way up:

USA, Canada and UK visa fee: $228.00

For all others, visa fee: $270.00 (Applicants from 35 countries)

However, this is only for long-term tourist visas over 2 weeks. Most nationalities can still obtain two-week visas on arrival and advance e-visas for a considerably more reasonable BD 7, or around US$19.

Another good candidate is the Democratic Republic of the Congo, where tourist visas issued at the Rwandan border cost a cool US$285. However, advance single entry visas are again more reasonable at GBP 60.

According to a study by Airport Parking and Hotels (APH) - (yeah I wouldn't trust that source either, but at least it's published), Russia is the most expensive visa to achieve.

Note that this is for UK nationals, but it's a start.

The former Soviet country charges £115 for a standard entry visa, with costs soaring as high as £220 for an “express” service.

Tanzania and Vietnam are the next most expensive travel destinations in terms of visas – charging £38 each for a single entry visa, according to Airport Parking and Hotels (APH), the long stay airport parking specialist – followed by China and India at £30.

Annoyingly they only surveyed 18 countries, and I'd love to know what they get for Bahrain, Argentina or Angola, who I've heard are expensive for Brits...

US charges between $150 and >$500, depending on the visa type, and the country of origin. And that's just for the interview. In return, some countries (in Latin America, for example) charge US citizens similar amounts. I know that Russia used to charge some obscene amounts (~$150) for a single entry visa a decade or so ago, don't know if its still the case.

Also, the costs should be adjusted to the length of the visa validity. Paying $150 for a 10-years multiple entry B1/B2 (tourist) US visa shouldn't be compared as similar as paying $150 for a 6-months single entry visitor visa to Russia.

And last but not least... The US for example charges hundreds of dollars from citizens of certain countries for limited visas, while allowing WVP (visa-free) travel to citizens of others. So many Europeans are not aware at all of the US visa charges, while many Middle-Eastern, Chinese and Indians need to empty their pockets.

(not to bash the US, I live there, just an example of how it is difficult to answer the question asked).

North Korea?

In order to go, you have to go on the government tour, which is about €1,000 IIRC. (It's not technically a "visa" but if you don't pay it, you can't get in)