A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

One of the largest mechanical models of the solar system in the world.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

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

This fantastical and eclectic English garden takes its inspiration from Egypt, China, the occult and more.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

The oldest inn in England served brew to the crusaders.

Fascinating town where normal life interfaces with the occult.

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

Eighty million natural history specimens call this gargantuan museum home.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A huge musical instrument played by the ocean.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

This haunting stone chasm is a hotbed of mossy rock and English legend.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

The tradition of using flowers to decorate wells is once again thriving in England.

6000-year-old site covered in more than 50 megaliths.

The world's first successful water-powered cotton mill paved the way for the factories of the British Industrial Revolution.