A tiny, hidden alleyway dedicated to the father of meteorology.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

This Manchester laundromat is hiding something.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

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

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

An old wool-washing house filled with Fluxus contemporary art.

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

A historic Christian shrine nestled within a spectacular natural cave.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

A whimsical garden of outsider art in the Spanish countryside.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Stunning Roman aqueduct used for 1900 years and still standing.

A completely underwater art museum sends a stark message about humans' impact on the environment.

An architect transformed this abandoned cement factory into his castle-like workshop.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A landscape decorated with enormous skull sculptures.

A Spanish forest is filled with mysterious stone carvings.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.