The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This is the oldest Roman-made bridge in the city still existing in its original state.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

The Pope’s secret escape route.

At the base of this tower, a plaque marks the original center point of the Netherlands.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A town that sets itself apart with supersized designer seating.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

In this truly magical place, rent hasn't been raised since the year 1520.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

Go surfing on this urban wave, "hacked" by local surfers.

An unofficial monument to the late King of Pop sits at the base of a Renaissance composer's statue

One of the most easily accessible examples of the rare 1960s UFO houses.

This public amphitheater was once a key part of Monaco’s defense strategy.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

The first Confucian temple in Taiwan, founded by the son of a pirate lord, doubled as the island's first state-sponsored school.

This magical place built as an astronomical center starred as a James Bond villain's lair.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

The clock tower is a prominent landmark in the bustling commercial hub in the heart of Jodhpur, showcasing intricate architecture and cultural significance.

Dedicated to the life of a brave woman soldier.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

Many Hindus make the long pilgrimage to this holy city to have their remains burned on the banks of the Ganges River.