Stunning Roman aqueduct used for 1900 years and still standing.

Baroque celebration of the end of the Great Plague of Vienna.

Breathtaking and huge 430 year old maps of Italy.

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

A contemporary art installation housed within a Gothic cathedral.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

Climb inside an iron crystal magnified 165 billion times its normal size.

Brussels' favorite peeing boy has a sister.

Cozy basement bar sports an inventory of over 2,000 beers.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The largest known Ancient Egyptian obelisk.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Hiding the longest subterranean river known in the world.

Op-art architecture designed for happiness.

Home to the world's oldest functioning orrery.

A miniature city, once ruled by the Queen of the Netherlands.

Museum preserving torture methods from the past.

Building Men of War and Indiamen from Holland's Golden Age.

Theme park featuring miniature replicas of European monuments.

A little sculpture with a large wardrobe.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

Northern Ireland's Brobdingnagian stepping stones.