Places F40fan Wants to Go

The world's largest private telescope collection hides in a secret wing of a Dutch auto museum.

Ride the rails on a train harkening back to a 19th-century marvel.

This French chateau is home to the world’s largest private collection of fighter jets.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

This disused boat elevator was saved from the scrap heap so that visitors could tour its rusting skeleton.

The shape of this old salt factory complex was inspired by the course of the Sun.

This striking fort on the Maginot Line looks just as it did after being destroyed in the Fall of France.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

A massive base for the Nazis' most formidable weapon in the Atlantic.

The world's most famous cheese caves.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

Museum in a swimming pool where the water still flows.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Historic medieval fortified city in southwest France.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This abandoned mining village was predicted to resist decay longer than any other modern human settlement.

This shuttered power plant is now Turkey's first industrial archaeology museum.

The last intact steam engine factory in the United States.