One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

The corpse bride of Portugal.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

A geological oddity topped with a 2,000-year-old pagan temple.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

With over 10,000 lights, this engineering marvel lights up the city after dark.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

One of the largest squares in Europe contains an entire artificial island.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

Built in 1933, this unique ballroom is nicknamed the "floating dance floor."

Walk up a ramp through a forest for panoramic views of Lake Michigan.

A lovely hidden waterfall right off the highway is well worth a stop.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.