Vernon East/Takoma Park is a tunnel in the partly caved in old Metro. It gives a route from Vernon Square to Takoma Park. This tunnel is very long and windy. Its Vernon Square East entrance can be reached from the Vernon Square side by traversing the radioactive ground above the sewer, it is located behind the rocket crash site and the ruins of the structure the rocket crash is located.
The tunnel is mostly collapsed and has a small amount of irradiated water along the train tracks. The tunnel itself is linear and goes directly from Vernon Square to Takoma Park. It has numerous twists and winds past a large amount of collapsed rubble.
At higher levels, the hunters are replaced with mirelurk kings, which can be dangerous since they are in clusters of up to 3. It is also possible at higher levels that some of the super mutants may be replaced with super mutant overlords if the Broken Steel add-on is installed.
At the Takoma Station there is a large pile of rubble due to a tunnel collapse in the station area (in place of the normal overhead walkway). This rubble reaches the ceiling most of the way along, however it can be jumped over. Just be warned that once over it is impossible to get out.
The exception to this is of course for PC players, who can use the toggle collision command tcl to get out.
In the Takoma Station men's washroom, there is a mirelurk egg in a toilet in one of the stalls which can be opened for hatchling mirelurk meat. A similar egg is also in a stall two stalls down but has already hatched or was broken. Both washrooms contain clusters of mirelurk eggs, suggesting they are using them as hatcheries. In this regard, clusters of middle sized eggs and single, large eggs are the same and each grant mirelurk meat.
Though the local map calls this area Vernon East/Takoma Park, the writing on the wall indicates that this is Abernathy station, which is shown on the DCTA Metro map. This means it is part of the White Line. That map shows Vernon Square station to the west, then a station called "Becton" before the Abernathy station. Signs at Vernon Square Station indicate that the tunnels on the right lead to Becton station. However, these tunnels are marked as "Metro Junction" and lead to this station. This could mean that the Metro Junction station is actually the Becton station.