Arthur, Merlin, and Guinevere are among the largest and oldest satellite dishes on the planet.

A circle stone within a stone circle.

These "bridges" help confused bats cross the road.

The last fully working Victorian Turkish bath in England.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

The largest mosque in Germany.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

The final resting place of one of the brightest physicists of the 20th century.

Did he come up with a theory of cosmic-ray showers while sitting in this bath?

A collection of noses tucked inside an art museum reveals how times have changed.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This sublime architectural marvel is a rare example of an expressionist church.

A 142-foot-tall Q-tip on Bristol's skyline.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

Hotel designed by indie graphics artists.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

A 20th-century picture show in 3-D.