Hidden within Sydney’s lush Royal Botanic Garden is a walled cactus rockery and the site of Australia's first zoo.

This work of art was designed to represent the Tarpeian Way Quarry that once dominated the area.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

A self-funded cemetery with a long list of inhabitants.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

A centuries-old forgotten underworld lies beneath Malta.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

The oldest private art gallery in all of Hungary.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

A garden in Lisbon filled with giant porcelain creatures.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

The Hungarian biochemist whose research helped develop mRNA-based vaccines for Covid-19.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

The true meaning behind this sculpture remains unknown.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.