This concrete monster of a wreck lies in the mouth of Langstone Harbour as a monument to the incredible history of D-Day.

This antique prison is a tourist attraction with a sordid past.

A 16th-century artillery fort built to protect England against European invasion.

Hear the quietest sound from across the dome.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

One of the most historical literary characters continues to stroll his hometown.

This famous writer's tombstone is a literary pilgrimage site that was publicly defiled by a rival.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

Two thirds of this Montreal neon icon has survived to flash another day.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

These "bridges" help confused bats cross the road.

A open air theatre built on a cliff by an eccentric British woman.

The largest greenhouse in the world is home to over one million types of plants.

400-year-old garden, restored to beauty.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Pop culture has helped to keep this iconic British building from being destroyed.

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

This hidden green space is the city's second largest conservatory.

Inspired by Thomas Stothard's painting of the "Journey to Canterbury," albeit with Canterbury natives.

A wonderfully eccentric Victorian-era museum and library.