This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

An ancient city hidden in the heart of the Sierra Nevada mountains.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

It was once nicknamed "the most bombed hotel in Europe."

The first piece of public art dedicated to LGBT rights.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

Founded as a refugee camp, now a popular tourist spot.

An important landmark in the history of algebraic logic.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The modern birthplace of Irish freedom.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.