The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

The construction of a tram line unveiled hidden remnants of the old medieval city.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

The busy transport hub is home to the tallest airport slide in the world.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

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

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This magical-looking island is notorious for the misfortunes suffered by its owners.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Hamburgers are intensely proud of their tunnel beneath the river.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

The most visited, and possibly most controversial, museum in Germany.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Tiny memorials honor individual victims of the Holocaust.

Berlin's old airport.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Metro station with a claim to rock n' roll fame.

Started as a kitchen garden, now the second largest botanical garden in the world.

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

A former ironworks that was the first UNESCO industrial site.