This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

An ancient knight and a symbol of the city's freedom.

A miniature train-ride through Slovenia's largest cave system.

The "dragon babies" of southeastern Europe.

Stalactites and stalagmites in a beautifully lit cave.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

Breathtaking and huge 430 year old maps of Italy.

The Pope’s secret escape route.

Fountain where visitors can earn a license to be mad.

Pilgrimage site for star-crossed lovers.

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

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A lover's walk between hilltop towns, decorated with graffiti love notes.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

The prototype for all Nazi concentration camps.

A serious museum dedicated to two German comedians.

A mocking tribute to the past and modern leadership of Prague.

Macabre astrological automaton clock dating to the late 1400s.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The "Little Ones," show Portugal in full miniature splendor.