A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

The ancient tomb acts as a calendar that keeps perfect time.

This Neolithic passage tomb forms part of a World Heritage Site.

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

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

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

Public water fountains built during the Ottoman Era still stand throughout this seaside town.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

A sharp sculpture made of thousands of pieces of jagged glass.

Legend says this sacred tree was a gift from goddess Athena.

This legendary city has been a tourist attraction for centuries.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Every weekend, the parking lot of this Buddhist temple turns into a Thai street-food paradise.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

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

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.