A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

A modern reimagining of a medieval city gate.

This enigmatic artifact remained buried in a churchyard for years.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

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

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

A lush oasis full of vibrant plants and striking geometric displays.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

A micronation on an islet along the coast of a Portuguese island.

A shrine-like museum entirely dedicated to soccer superstar Cristiano Ronaldo.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

A garden in Lisbon filled with giant porcelain creatures.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

The best place in the world to buy tinned fish.

The world's oldest bookshop still in operation.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A towering monument to war, located on a beautifully peaceful hill.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

One of the world's heaviest musical instruments towers within a popular urban park.

A 12th-century fortress containing some of Berlin's oldest buildings.