Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

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

The first green space constructed on an elevated viaduct.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A haunting collection of the vanished and disappearing natural world.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

France's most famous cemetery, with some of its most curious tombs.

According to legend, Bob Dylan sneaks in twice a year to eat dinner with Jack.

One of America's most historic homes also holds a startling literary legacy.

This is the house that spite built.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."