This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

This historic electric train has operated with regularity since the early 1900s.

This isolated island is often capped by its own fluffy cloud.

Greenery covers the face of a gently-dripping waterfall deep in the mountains of central Sardinia.

These small, triangular, colorful houses are a staple of Madeira Island.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

This Victorian water wheel is affectionately nicknamed "Little Isabella."

A 150-year-old steam locomotive crosses the southern half of the island daily.

This concrete memorial commemorates a group of brave locals who saved the crew and passengers of a wrecked ship.

A well for a well, this anachronistically Indian-styled water pit was built in its small town home in gratitude for a similar favor.

Once the site of medieval pilgrimage for its healing powers, this well was lost and later rediscovered.

This tall stone wall with no door and ill-matched windows was built centuries ago, and used as a shelter for domesticated pigeons.

A Neolithic burial tomb connected with a colorful array of legends.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

A museum dedicated to Wales’ favorite—and strangest-looking—watercraft.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

This 19th-century island fort built to protect against an invasion by sea.

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

The granddaddy of English geoglyphs dates back to the late Bronze Age.

Eat fish and chips in a striking Neoclassical building that once hid a public lavatory.

A vortex fountain that seems to rise out of the ground.

A Brutalist monument in the middle of a housing estate by artist Victor Pasmore.

This moss-covered boulder is said to be part of a diabolical plant to sabotage the Durham Cathedral's foundation.

Legend says squeezing into this slender stone seat will make your wish come true.