Built for an exposition in 1915, these horticultural displays have stood the test of time.

A blast from the past in central San Diego.

This legendary city has been a tourist attraction for centuries.

Rest stops along this pathway offer some of the best views of the Acropolis of Athens.

A rather vulgar example of the transition from Latin to the Italian vernacular.

A Nesting Doll of Churches.

Rainbow arches made of shipping containers grace the entrance to one of France's largest seaports.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

Horse cemetery on the grounds of Blarney Castle.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

A haunting medieval cloister that once served as the friars’ burial ground.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A whimsical Renaissance fountain sculpture from Florence, world-renowned for defying convention.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Pilgrimage site for star-crossed lovers.

A twisted steel beam from the wreckage of the World Trade Center is the centerpiece of this memorial for those who died on September 11, 2001.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

This network of narrow, medieval passages has the most delightful name.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

360° views of the city plus five floors of optical illusions and hands-on science.