Europe's oldest still-operational tea farm also boasts a spectacular view.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Three hundred years of preserved Spanish colonial history in San Antonio.

This historic square in Nepal is home to temples dating back to the third century.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

Sacred Buddhist home of some spiritual monkeys.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Elaborate tile work in this railway station tells the story of Portugal.

The stunning interior of this Gothic church is covered in ornate gold details.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

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

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

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

This curious, round temple is the oldest still-standing marble building in Rome.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

This large, circular tomb is the final resting place of the first emperor of Rome.