A controversial blue hoop has been puzzling freeway drivers since 2013.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

A historic observatory precariously perched at the "Top of Europe."

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Breathtaking and huge 430 year old maps of Italy.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.

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

An effigy of Vancouver's Gastown neighorhood's namesake.

A hat for every occasion can be found in this British Columbia haunt.

Surprisingly delicious Asian-style hot dogs.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.