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

Eighty million natural history specimens call this gargantuan museum home.

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

Surreal riveted sea forts once protected the Kent shores from German attack.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.

A fantastic castle rumored to be the birthplace of King Arthur.

The longest hedge maze in the world.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A kaleidoscopic warehouse-maze of handmade neon signs.

This South London cemetery holds the remains of more than 15,000 people.

Famously misunderstood wonder of the ancient world

The world's largest collection of witchcraft regalia.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Some of the best-preserved specimens of the monumental medieval tombstones found throughout Bosnia and Herzegovina.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

The place where World War I began.

Oriental bazaar in the heart of Sarajevo.