This home on a quiet suburban street is completely covered with vibrant mosaics.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

A Swiss board game museum housed inside a picture-perfect castle.

What looks like missing grout is actually an old pub's peephole.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

This British museum hopes to take the taboo out of poo.

Colorful concentric circles honor a small Croatian town's supposed spot at the nucleus of it all.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

The Incas turned this ancient Wari aqueduct into an imposing defensive gate.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

A jagged silhouette of shamanistic stone heaps rises from the shore of this dazzling mile-high lake.

A series of recreated fortifications mark George Orwell's path through the Spanish Civil War.

The quirky - and private - constructions of a secluded artist depict the house of God.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

Thousands of letters to Santa get delivered to this mailbox in Greenland.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.

An old wool-washing house filled with Fluxus contemporary art.

A little-known sculpture park of contemporary environmental art in a Lapland forest.

Nuclear waste experts study this prehistoric crater lake to envision landscapes one million years in the future.