One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

This antique thermometer honors the creator of the first universal temperature scale.

Several 12th-century ruins can be found inside this historical market.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

One of Belgium's oldest hospitals saw patients from the 13th to 20th centuries before becoming a museum.

Christ's blood preserved in a Belgian town.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Step back in time at this 19th-century kiosk.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

An art-filled botanical garden and former dyeworks hiding in plain sight.

An ancient ossuary in Rouen.

Located in the house where Gustave Flaubert was born, this odd museum has more to do with medical grotesquery than the Western novel.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

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

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

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