The sole surviving relic of the San Francisco neighborhood cobbled together from old horsecars and streetcars.

This isolated island is often capped by its own fluffy cloud.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

All that remains of the only English cathedral destroyed in the Protestant Reformation.

This amazing 15th-century mural remained hidden in plain sight for centuries.

The original resting place of Queen Cleopatra and Mark Antony's only daughter.

A lush indoor jungle fills this bustling Madrid transportation hub.

Australia's only active volcanoes and highest peak are located on these remote islands thousands of miles away from the mainland.

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

Contrary to what its name suggests, you won't find any bunnies here.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

The last resting place of the famous Native American princess is marked by a haunting monument.

Spend the night in this formerly abandoned traditional Scottish village.

The world's oldest optical museum is an odd collection where the exhibits look at you.

These ornate arches show how the course of the River Thames has changed.

A statue of the original Pearly King is hidden in a church's crypt.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

The television series' iconic giant foot was borrowed from this classical painting.

The sumptuous ceiling was one of the last things Charles I saw before his execution.