This colorful gate stands as an entrance to the walled city of Old San Juan.

A monument on the pavement marks the spot where two cultures that shaped Sarajevo come together.

Home to an apple tree that can produce 25 different varieties of fruit.

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

The oldest alley in San Francisco is paved with a reminder of the city's original shoreline.

This airfield played a key role in both World War II and the Cold War.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

Historic medieval fortified city in southwest France.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

A public work of art that also provides some relief from the summer heat.

The first mural ever dedicated to the women of the Black Panther Party.

The oldest dim sum restaurant in the United States is a nostalgic jewel.

A series of vibrant murals celebrate the culture and community of Oakland.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

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