The largest greenhouse in the world is home to over one million types of plants.

The ancient tomb acts as a calendar that keeps perfect time.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A layered tribute to the work of mosaicist Isaiah Zagar.

A huge musical instrument played by the ocean.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A snapshot of the city's fascinating voodoo culture.

Elevated freight railway turned wildly successful urban park.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

This luxury shopping lane has been protected by its own tiny police force for over a century.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

A 300-year-old cottage decorated with tens of thousands of seashells arranged in intricate patterns.

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

Some charming, but sadly, unloved animal statues call this park home.

A fabulously bizarre surrealist sculpture by the late artist Leonora Carrington.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

A Volkswagen Beetle decorated with millions of beads connects Mexico's past and future.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

A small building that loosely resembles a tooth is appropriately used as a dentist office.