A stretch of land where the sour-sweet vegetable is cloaked in darkness and grows so fast you can hear it crack, squeak, and pop.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A mysterious crater-like pond has a spooky tendency to empty and fill with complete disregard to rainfall patterns.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Eighteenth-century home, where Herschel discovered the planet Uranus.

The ornate structure is part of a building boasting more marble than the Vatican.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

One of England's most famous churches hides a pair of little known architectural treasures.

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

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

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

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

A breathtaking flower tunnel bursts with beautiful golden blossoms.