A beautiful but toxic fountain of mercury.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.

A strange anthropomorphic stele with a mysterious inscription that has never been deciphered.

This tiny store is your one-stop shop for all sorts of rare and wonderful buttons.

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

These layered sandstone mountains in China look like they are made of pressed crayons.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

This extraordinary geological oddity resembles human-made pavement.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.