Theme park featuring miniature replicas of European monuments.

Climb inside an iron crystal magnified 165 billion times its normal size.

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

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

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

Giant, friendly pelicans in Central London, the most unlikely of places.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

A sharp sculpture made of thousands of pieces of jagged glass.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

An ancient octagonal weather station named for the eight Greek gods of wind.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

Monasteries on rock pillars, once accessible only by frayed ropes.

Believed to be the only Orthodox church in the world that features a free-standing pulpit.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

Ancient ruins hidden underneath a modern luxury hotel.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

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

Stormy conditions send jets of seawater bursting through holes in the cliffs.

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

A historic Christian shrine nestled within a spectacular natural cave.

This charming, medieval walled village is Spain's first "book town."