This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Roman ruins top white travertine terraces formed by ancient hot springs.

A marvel of Byzantine engineering under the streets of Istanbul.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

An ancient Egyptian temple in the middle of Madrid, Spain.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Cliffside houses provide a spectacular view from their perch above the valley.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

Giant topiary dog once played a role in a terrorist bomb plot.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This beautiful spit of land was once the summer playground of the king of Spain.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

The final resting place of the great navigator, or maybe his brother.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

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

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

An artisanal toy-maker’s works are highlighted in this museum dedicated to the craft of toys.

The walls and ceilings of the "Mexican Sistine Chapel" are almost completely covered with mural, sculpture, inscriptions and oil paintings.

This art shopping center still boasts pieces of its past as a textile factory.

This botanical garden boasts sculptures, industrial ruins, and an endorsement from the Dalai Lama.

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