A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

This banal Parisian entranceway is not what it seems.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Walk through spectacular aisles of hanging meat and wagon wheel–sized cheese at the world's largest wholesale food market.

A modern-day Lascaux cave underneath Paris.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

The first green space constructed on an elevated viaduct.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A subterranean shelter remains intact under a busy Paris railway station.

This museum houses an imposing skeleton army comprised of creatures great and small.

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This impressive collection of skulls and bones was gathered by an ex-zookeeper who took advantage of a pig plague.

According to this bar, God gave an “11th commandment” to Antwerp: Thou shalt drink beer.

This memorial museum chronicles the apocalyptic destruction of the First World War.

This Belgian palace was long the domain of priests and aristocrats but is now being turned into an art commune.

A huge old mansion full of thousands of toys, each there to be used and played with.