This Nigerian nature reserve is home to the longest canopy walkway in Africa.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

The site of the climactic scene from the classic horror film is now a historic landmark.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The curious underground history of keeping Paris clean.

A haunting collection of the vanished and disappearing natural world.

One of the oldest masonic museums in Paris.

A museum which takes visitors to the côté obscure of Paris.

Got apples?

The Argonaute submarine was the French navy's pride and joy in the 1950's.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

Paris' linguistic guide to the international language of, yes, love.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

An unusual number plate signifies the building's saucy past.

This 18th-century sundial was designed to calculate the date of Easter each year.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A submerged archeological park still holds the wonders of a Roman Sodom.

This half-finished "city of toys" was almost Italy's own Las Vegas.