This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Five candy-colored villages on the Italian Riviera.

A lover's walk between hilltop towns, decorated with graffiti love notes.

This historic electric train has operated with regularity since the early 1900s.

One of the largest Roman settlements in Portugal.

An enormous public square and parade ground built to celebrate Ghana's independence.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

Where thousands of slaves passed through the "Door of No Return."

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

Model Trains and Much More in Hamburg.

Hamburgers are intensely proud of their tunnel beneath the river.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Go surfing on this urban wave, "hacked" by local surfers.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The last bastion of Roman presence north of the Alps looms over a German town.

A former ironworks that was the first UNESCO industrial site.

It's said the devil used this mushroom rock as a table for a late-night meal.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

A preserved college lock-up that recalls a clubhouse approach to discipline.