Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

More than 5,000 contemporary and "historic" mustards from around the world.

This ghost town in Belgium will lose its street art when it ceases to exist.

A lakeside garden in the Southern Alps full of whimsical artwork and thousands of beautiful flowers.

This Copper beech tree nestled on a nature reserve is host to a bevy of autographs from Irish literary icons.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A museum within a museum, devoted to history's most questionable medical devices.

The curios of pharmacist and collector Henry Wellcome.

Dedicated to the history of the health sciences.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The personal library of the founder of modern neurology is open to visitors.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

The abandoned tuberculosis sanatorium is said to be one of the most haunted places in Canada.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

This 20th-century mansion plays a key role in one of Puerto Rico's greatest novels.

Invading U.S. troops were first seen from this now-abandoned tower, leading to the Spanish-American War.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.

Legend has it this historic port was a popular hideout and smuggling spot for pirates.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This nearly abandoned "company town" is a ghost of Puerto Rico's once-lucrative sugar industry.