This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The oldest scientifically dated tree in Europe lives on a remote cliff.

The world's first underwater farm is home to more than 700 plants.

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

A cherry tree growing atop a mulberry tree.

Haunting graffiti left by prisoners of the Spanish Inquisition.

A sudden, striking cluster of hills south of Padua has been attracting visitors for centuries.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

A spiritual sanctuary in a natural cave.

Windblown rock formations in an ancient Roman quarry.

A beautifully well-preserved ancient Roman villa.

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

A tree that defies gravity grows in an ancient ruin.

Mysterious tombstones thought to be remnants of Atlantis.

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

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

A Milanese café entirely designed by the American director Wes Anderson.

The oldest botanical garden in the world that technically isn't the oldest.