A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

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.

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.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Miniature art that tells an enormous story.

A sprawling collection of over 106,000 toys from around the world.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

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

Home to the only outdoor municipal elevator in the United States.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

When ecosystems collide in the arid Southwest.

The largest land animal skull ever discovered.

The largest collection of political commercials in the world.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

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.

Anyone wanting to know what a dwarven mine sounds like need only visit the tunnels of this New Zealand artillery compound.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.