This place was called "The Station" by the group of explorer "shills". The rails are still under water to some completely flooded. It takes a boat to access this part of the underground quarry.

The viaduct Garabit is made entirely of metal. It was built by Gustave Eiffel & Cie in 1884 under the direction of the architect Leon Boyer. It is 564m long. Since the construction of the dam Grandval, a lake was formed under the viaduct, 95m below. Trademark Construction of Eiffel, it is no less than 678,768 rivets were used for construction.

A military fort place under the train station of Saint-Lazare. There's still some germans signs on the wall, describing the use of a ventilation machine.

Bedienungsanweisung:
1_ Hebel am vordereren Rohr auf
2_ Anlage betätigen mittels Fahrrad oder mittels Motor. Hebel auf Ein
3_ Hebel auf Aus
4_ Hebel am vorderen Rohr auf

They explain how the ventilation system works, with a bike or a car.

Under the great dome of the Hotel-Dieu de Lyon. The metal staircase provides access to the top where a small balcony gives a breathtaking view of the Rhone. The small dome has a circular balcony, overlooking a breathtaking view of the great hall of what will likely become a luxury hotel in 2012. Its concrete structure is impressive and gives a surreal side to the whole. Indeed, outside of the dome remains faithful to the original, before the fire of 1944.

Control Room of the NATO radar base, the fort of Mount Salbert.

Fort Lefebvre culminates at the top of Mount Salbert 650m altitude. It said a strong "Sere River". It was built from 1874 to 1877. On May 12, 1955, NATO reuses the fort to house a communications center and a radar base. The book is officially delivered to the Air Force ole March 26, 1958. The book "G" Air Defense Planning (DAT) has 7 radio antennas. The old fort is used as a barracks for soldiers.

The radar base is not exactly the strong, but under the fort. Access from the fort is a long staircase of 322 stairs that descends into a concrete wall strongly.

The site is no longer running quickly but it remains occupied by the army until 1972. The mayor of Belfort is the current owner. It secures the site is now a promenade.

Alone in the world. / Quarry of Bougival, under the Jonchère Park.

Large greenhouses of the Tête d'Or park was built in 1880 under the direction of Gustave Bonnet.

The corridor amphitheatres, under the roof of the ark.

Beams on the sides used to prevent adjacent buildings will collapse under their own weight.

At the top of the tower AXA. The platform is tiny and there is no security fence. Obviously, this part of the tower is still under construction.