The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Eighty million natural history specimens call this gargantuan museum home.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Walk through a fairytale in Tuscany.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Cave shrine on Monte Pellegrino.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

This subterranean necropolis holds three floors of antler-dug grave caves.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

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

3,000 market stands in five former Zeppelin hangars.

A black cat protests the City Guild in Riga's Old Town.

Flamboyant architecture from the turn of 20th century.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.