Started as a kitchen garden, now the second largest botanical garden in the world.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A cluttered and astounding collection of antiquities and curiosities.

Experience park where visitors are told to expect the unexpected.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The most visited, and possibly most controversial, museum in Germany.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Northern Ireland's Brobdingnagian stepping stones.

Famously misunderstood wonder of the ancient world

Macabre astrological automaton clock dating to the late 1400s.

The fairy tale castle of the "fairy-tale king."

An eerie, derelict amusement park in Berlin.

Medicinal spa created with the discharge from a geothermal energy plant.

The largest of the Fuji Five Lakes is home to an impressive swan population—some real, some with paddles, and one with an observation deck.

This town near Nagasaki is flecked with fruit-flavored bus stops.

"Singing sands" and the world's largest hourglass reside near Japan's Kotogahama beach.

This high-design church is made up of two dizzying spirals meant to evoke the weaving together of marriage.

The divine septet of Japanese fortune gods are rendered in 1,000 year old wood at this peaceful site.

Burial mound for the ears and noses of thousands of mutilated Korean soldiers.

We heard you like volcanoes so we put a volcano in your volcano so you can die for sure...

Founded over a thousand years ago, this shrine is said to be built on the site of a warlord's harem prison.