This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

Colorful and chaotic stacked hotel in North Holland.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The broken skateboards that became a poignant memorial to a murdered skater.

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

One part local history, 99 parts gruesome haunted house.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

The commemorative stone column conceals a secret laboratory.

A Roman spa buried deep beneath the City of London.

A hands-off space for graffiti artists to hone and display their skills.

A faded reminder of what was once a common sight in London during the Blitz.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

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

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

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

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

These morbid carvings remind churchgoers of the inevitability of death.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.