Perhaps the most spectacular grotto along the Algarve coastline.

This neo-Gothic monastery offers a rare chance to witness the unique maned wolf right up close.

This Swedish sculpture park is a unique combination of ancient ruins and modern art.

Rising from the sea like a stone monster.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A one-of-a-kind collection of a unique medium.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The world's only museum devoted to the wonders of fluorescence.

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

An exquisite tunnel of cascading flowers.

A psychedelic labyrinth on the San Francisco bay.

The world's biggest version of the popular Swedish souvenir.

This statue is dedicated to the animal cosmonauts that perished during space flight experiments.

The world's first ice hotel is still one of the most elaborate and beautiful.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

This lake-bound geographical marker sits at the point where three European countries intersect.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

One of the most iconic neon ads of former East Germany.

This conical hill was built as a testing ground for an engineer known as the Glider King.