Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This curiously modern carving of St. Peter wears wellies.

This charming, narrow-gauge railway in the Thames Estuary is sometimes referred to as the "Train to Nowhere."

Island wonderland for communist autocrats.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A scale rocket of an Ariane 5 rocket serves as a monument to a pioneer of space science.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

A unique bridge with an equally unique view.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

This natural hill rose another 130 feet from the debris and rubble added after World War II.