Built by the Ancient Greeks, this chariot bridge is still in use today.

Ancient Greek oracle of the dead.

Step inside an ancient beehive tomb built for a mysterious cult hero.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

A Jenga-style cylindrical tower of books that appears to go on forever.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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

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

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

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

Modern sundial uses ancient methods to tell time and date perfectly.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

A moody and picturesque riverside ruin overgrown with vegetation.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

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

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This supermarket offers shoppers a window into the past alongside their groceries.

The secret medieval communication system will whisk your words above the noise of the crowd.

"The prettiest love letters in the world" ... or so said Lord Byron.