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

The oldest stone house in Paris was built by its most famous alchemist.

Notorious artist squat renovated into legal studios.

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

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

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

The world's longest continuously running show has played at this small West End theater since 1974.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

A small museum that celebrates the history and culture of the LGBTQ community in England.

London's Victorian Tower of Babel.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This bookstore serves recipes from the cookbooks on sale.

This studio was home to David Bowie's first single, even if it did turn away the Beatles.

A plaque marks the underground site of one of London's "lost rivers."

A gallery specifically dedicated to the botanical illustrations of a remarkable traveling lady.

This mysterious and unique painting is filled with symbolism.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

London's marvelous wildfowl reserve along the Thames.

A unique tribute to the millions of animals who served and died for the British military.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Ship-sized kinetic sculptural fantasy.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.