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

Hamburgers are intensely proud of their tunnel beneath the river.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

The charred, dead skeleton of an oak tree is said to have consoled a dying 16th-century Italian poet.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

A square-domed symbol of resilience in the heart of the old Jewish Ghetto.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This curious, round temple is the oldest still-standing marble building in Rome.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

This ancient market is often referred to as the oldest shopping mall in the world.

Eat the ultimate iteration of Portugal's most beloved pastry.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

The unexpectedly beloved remnants of a controversial thermal power plant.

Mountain where Jesus was first tempted by the Devil.

A delightful but little-known public observatory and planetarium in Munich.

The 10,000 Torii shrine.

A surprisingly detailed model of one of the most powerful telescopes in the world.

A memorial dedicated to those who lost their lives working in what is now a massive tourist attraction.

These unusual rooms on wheels are holdovers from the 1960s.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This massive swimming pool is the high tech home to the human-powered submarine races.