One of the world's largest collections of pathological specimens.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

A Roman spa buried deep beneath the City of London.

The last four extravagant street signs of London's historic banking street.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The curios of pharmacist and collector Henry Wellcome.

The remains of the great moral philosopher reside in a university in London.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

A very classy 1920s-era bar right in Grand Central Station.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The house where John Wilkes Booth conspired with his co-conspirators.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

Home to a vast and influential collection of Shakespeareana.