This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

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

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

A vintage video game wonderland in downtown Reykjavik.

This tiny museum's sizable collection is jammed into a former underground public toilet.

The largest whale museum in Europe allows visitors to walk among life-size giants.

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

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

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

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

The Tudor-style cottage in the middle of the square is not quite what it seems.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

Christ's blood allegedly preserved in a Belgian town.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

A marvel of Byzantine engineering under the streets of Istanbul.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This museum houses an imposing skeleton army comprised of creatures great and small.

The celebrated eyesore created by starry-eyed sweethearts.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A series of abstract, silly sculptures represent the works of a great modern classical composer.