This unique shop is full of memento mori art, antique medical equipment, secret society paraphernalia, and historical relics.

Shop for books in the New Orleans house where William Faulkner once lived.

A treasure trove of rare and exquisitely detailed antiques

One of Europe's largest supercomputers is housed inside of a disused chapel.

A charming flea market shop dedicated to retrofuturistic apparati.

An antique curios dealer and hybrid taxidermist.

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

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

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

This Parisian café sticks almost exclusively to an ethos of reuse.

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

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

This massive library holds what was once the largest book collection in the world.

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

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

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Home to a vast and influential collection of Shakespeareana.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.