A book bound in the skin of an infamous criminal, along with countless other specimens.

Hear the quietest sound from across the dome.

Regency-era excess on the English Coast.

Decrepit Victorian public lift is a white-knuckle ride.

A miniature city, once ruled by the Queen of the Netherlands.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

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

The most confusing clock in New York.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Museum dedicated to "the man who moved the Earth."

An impressive monument to Poland's independence.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

For a couple of months each year this Swedish city turns into a festive neon phantasmagoria.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.