The oldest public library in Ireland.

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

This lighthouse was crafted as penitence for the theft of wine bound for a monastery.

A glimpse into the festive and private lives of medieval Europe.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The beautiful baroque library of the Hapsburg empire.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

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

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

This hidden 13th-century tavern room has a few Shakespearean connections.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This Underground station has been a popular filming location for decades, even before it closed.

This museum is dedicated solely to this millennia-old handheld cooling device.

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.