The wreckage of a tragic plane crash is on display at this museum devoted to a famous Italian conspiracy.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

These enigmatic columns tower over the ruins of an ancient Toltec city.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

Twelve natural mummies are displayed in the crypt of this former monastery school.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

The sculpture of the deceased cockatoo flops atop its personal plinth.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

Giant, friendly pelicans in Central London, the most unlikely of places.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

One of the oldest masonic museums in Paris.

Indents in the pavement are all that remain from a grisly death machine in Paris.