A beautifully eclectic mix of architectural styles.

The history and future of cannabis.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

Museum preserving torture methods from the past.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Roam the cradle of the Cuban Revolution with life-sized dinosaurs.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

Go inside to really appreciate this 500-year-old technological masterpiece.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Where Venice's gondolas go for a tune-up.

100 year tradition of fist fights, marked by marble footsteps.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

A diverse collection of wax, bone, papier-maché and mummified relics.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The largest known Ancient Egyptian obelisk.

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.

Slum Settlement Filled With Mountains of Garbage.

A huge museum of much more than just agriculture displayed in a princess's palace.

An endless sea of white conical domes.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.