One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

A hidden alley in urban Baltimore is a haven for graffiti artists.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This modern labyrinth lies in the shadow of a ruined medieval castle.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Geodesic dome luxury retreat in the Scottish Highlands.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Every birth, death, and marriage is recorded in these color-coded leather-bound books.

A book bound in the skin of an infamous criminal, along with countless other specimens.

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

360° views of the city plus five floors of optical illusions and hands-on science.

This beautifully deceptive waterfall is something far different from what it appears to be.

A mysterious pillar in an ancient burial chamber is said to predict how long you have to live.

The ancient abodes are a testament to human ingenuity amid harsh climates.

The ornate miniature mansions were built for Istanbul's feathered residents.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A meow-velous tribute to a beloved street cat, made famous on the internet.

Naturally protected city carved from a rock face.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

Roman ruins top white travertine terraces formed by ancient hot springs.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.