The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

Renaissance villa and gardens complete with a tormented colossus.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Singapore's landscaping project is home to 18 incredible Supertrees.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

This home on a quiet suburban street is completely covered with vibrant mosaics.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

A massive underwater sinkhole made famous by Jacques Cousteau.

Bacteria and algae give the salty water its bubblegum hue.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Crushed coral and crystals give the sand its signature coloration.

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

Stormy conditions send jets of seawater bursting through holes in the cliffs.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

This unusual lava tube spouts seawater during high surf.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

Step into a cartoon at this Seoul café that aims to evoke a two-dimensional scene.

A park filled with vibrant mosaics created by more than 300 folk artists.

The tiny airport in remote Newfoundland that inspired a hit musical is also a modernist architectural gem.