A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

With over 10,000 lights, this engineering marvel lights up the city after dark.

You'll find just about anything in this funky Tbilisi flea market.

Liechtenstein's royal family calls this medieval alpine castle home.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

Giant, friendly pelicans in Central London, the most unlikely of places.

A hands-off space for graffiti artists to hone and display their skills.

Black cat statues guard this temple-like Egyptian revival factory.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

This little-known national museum houses over 40,000 works of art from across the world.

This museum contains a vast array of puppets and marionettes from all over the world, featuring incredible works by Portuguese creators.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”