The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

This bridge was constructed from the rubble of the infamous Bastille.

The celebrated eyesore created by starry-eyed sweethearts.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

A huge boat-shaped hotel with a blood red pool and other oddities.

A 125-meter long "tribute to the Brazilian people."

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

The largest library in Latin America owes its existence to an Old World earthquake and a Napoleonic invasion.

A pocket of Buenos Aires with an unusually high concentration of psychotherapists.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

3/4-scale model of the White House in Atlanta, Georgia.

The small first-floor apartment where the author wrote her Pulitzer Prize-winning book 'Gone with the Wind.'

A psychedelic tribute to one of Georgia's most unique artistic visionaries, out of place and time in the heart of Atlanta.

An underground magnet for ever-changing street art.

A vision of beautiful Hindu architecture in the middle of the American South.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.