I think there are also 'exchange stations", where one cannot exit station, but ev. changing platforms or train)

Does it have to be an actively served station, or are you interested in recent history as well? If the latter, Redcar British Steel would likely qualify, but it was closed a year ago.

Relevant but not an exact dupe: travel.stackexchange.com/questions/104409/…

Do stations where people can move from one platform to another but not leave the station as a whole count?

The Kjosfossen Station (en.wikipedia.org/wiki/Kjosfossen_Station) on the Flam line in Norway exists to provide views of a waterfall. I can't tell if there's access other than from the train but it may be a candidate.

Are passengers actively banned from accessing that station or is it just impractical? I could easily get there with an inflatable kayak, deflate the boat and then board the train :-)

Does this include heritage railways? They have loads of "middle of nowhere" stations that are only for train riders to stretch their legs, e.g. Whittaker on the Cass Scenic... It's expected 100% of people who alight will reboard.

@JonathanReez I believe you'd need some sort of climbing equipment to get to the platform. I mean, an inflatable kayak might not be the best tool for climbing concrete walls.

@JonathanReez I think you will need some climbing gear as well google.com/maps/place/…

The Pentagon Metro Station is useful for Pentagon employees and as a transfer station for others. You can transfer from rail to bus or bus to rail, but you can not walk away from the station. I do not think taxis or ubers can reach the station either.

@emory: Pentagon Station serves as a transfer station for the Blue and Yellow lines of the Metro and is the northern most point before the two lines diverge. The Pentagon Employee access tunnel is no longer and use, so you actually have to exit the station to go to the Pentagon. Non-Employees will also exit this station to visit Pentagon Memorial as well as to go on publicly available tours (suspended as of time of writing due to Covid-19 restrictions.). So this would not count.

@hszmv if you are not a Pentagon employee can you do anything other than transfer to another bus/train, visit the Pentagon Memorial, or go on a tour? I suspect if you are a Pentagon employee you could properly walk away. They must have a way to access the huge parking lots surrounding the building.

At Lo Wu station in Hong Kong you cannot leave the station without crossing the boundary (effectively an international border by another name) into the mainland- requiring a visa for most nationalities- or without a Lo Wu Resident Card or Closed Area Permit allowing entry into the New Territories closed area. The permits are limited to those with legitimate need. HK exit is guarded by police.China exit by immigration.

@emory the last time I was at Pentagon Station, yes, you could walk around the memorial and parking lot without having anyone check your ID. I have also rideshared to the Pentagon parking lot and walked straight to the station and caught a train to somewhere else (again without being required to show ID), so I'm pretty sure this station doesn't count. It would be an interesting question if the guards there (who often carry assault weapons) are entitled to request ID from or search people just walking around in the parking lot. Given the posted warning signs, I suspect the answer is yes.

@emory there is also a bus terminal at the Pentagon, and one can change from bus to train there. I haven't done it in a few years, but I remember just going and transferring - the armed guards just watched me without asking me who I was or why I was there.

Strange, I'm REALLY sure I heard about such a station several years ago (before 2019).

There are two pedestrian routes (one a sidewalk, one a separate tunnel) under Interstate 395, an unrestricted pedestrian route that leads to pedestrian paths along VA 204 and VA 27, and an unrestricted sidewalk that allows pedestrian access to the pedestrian / biking paths along the Potomac. All of these are accessible without restriction from the Pentagon Metro station. All these routes are also cyclable.

@Randall I did not see them, but you are probably right.

@RobertColumbia evidently there are pedestrian tunnels but if the only way for ordinary passengers in/out the station was through a metro or bus transfer then I think it should be counted.