Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The celebrated eyesore created by starry-eyed sweethearts.

Ancient paintings known as the "Sistine Chapel of Cave Art."

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Petting this mysterious iron monkey supposedly brings good luck.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

The world's tallest boat lift stands as a massive piece of industrial tourism.

Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

Lavish royal estate punctuated with heated greenhouses.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

A little sculpture with a large wardrobe.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

"A hideous albatross in the Hudson River Valley."

Why have you never heard of the second most popular tourist site in New York?

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Two massive rock outcroppings on the Oregon coastline.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.