A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Try not to get slimed in Tribeca.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Eclectic final resting place of the controversial explorer.

These morbid carvings remind churchgoers of the inevitability of death.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Where condemned pirates met their grisly end at the gallows on the River Thames.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

An incarceration museum on the spot of possibly the oldest prison in England.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The anatomical-pathological collection of a man who changed surgery.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

Catacombs turned marketplace.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

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

Rebuilt remains of a temple to Roman god Mithras.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.