In 1931,[5] a new prison was built, called "Bagne des Anamites", in order to receive Indochinese opponents to the French presence in Indochina.

The prisoners men performed manual work and built in particular the railroad into the interior.

[6] Montsinéry is home to a shortwave transmission facility operated by the TDF Group that is designed to target listeners in the Americas and West Africa.

An image of the rotatable curtain array antenna in Montsinéry can be found by searching Flickr for "Montsinery antenne".

Voice of Russia began transmitting to North America from Montsinéry — its first transmissions from the western hemisphere since the early 1990s (it previously broadcast from Havana).

It is also an eco tourism location offering water bikes on the river and horse rides.