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

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

One of Europe's oldest libraries.

This 11th century tower is said to be the oldest building in Oxford.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

It might not be the prettiest pyramid in Egypt, but it may be the muddiest.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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 legendary city has been a tourist attraction for centuries.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

Museum celebrating the achievements of the Soviet space program.