This national landmark is also home to a massive treehouse.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This medieval castle is filled with an eccentric collection that ranges from ancient Egyptian artifacts to taxidermy to a mummified hand that was cut off during a duel.

A 16th-century footpath said to be haunted by a young girl that died trapped within its misshapen old house.

This imprint of an old computer keyboard has a unique backstory.

One of the oldest bridges in Norwich was used during the English witch trials and is said to be haunted.

A magnificent Victorian garden that brings the charm and style of old-time aristocracy to the 21st century public.

The smallest pub in Britain was once a cabinet of curiosities and it still has the dead cat to prove it.

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

Climb to the top of this windmill for a scenic panorama and up-close look at wind energy production.

All that remains of the fishing-vessel-turned-warship is its weathered hull.

The wreckage of an old coastal trading vessel is only visible at low tide.

This small group of sand dunes manages to pack in a strange rainbow of colors.

This futuristic building is yet another architectural wonder in Dubai.

These Stolpersteine located in Spain honor Republican soldiers who perished at the hands of Nazis after the fall of France.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The Hveragerði fissure runs through this unassuming shopping center.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Balconies that have a most unusual accent.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.