The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This small museum in a 17th-century building honors three iconic Scottish writers.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Shop at the 200-year-old store where Julia Child stocked up on copper cookware.

The only theatre in the world constructed specifically for sound movement.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A lush indoor jungle fills this bustling Madrid transportation hub.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

A stately palace has been converted into the world's largest cannabis museum.