The Palais des Nations, once home to the League of Nations, now serves as the UN’s European headquarters. You can take a guided tour (with advance booking) to see spaces like the Assembly Hall and the Council Chamber, where international negotiations still happen today. The building sits inside Ariana Park — a quiet, green space dotted with old cedars, roaming peacocks, and views down to the lake.

This interactive museum is an exceptional place to gain a deeper understanding of Warsaw’s history. It was founded in commemoration of an event that profoundly changed the city: the Warsaw Uprising of 1944. Listen to the oral accounts given by insurgents, go down into the sewers — similar to the ones that insurgents used to move around the city — and see The City of Ruins, a bird’s-eye view of Warsaw burnt to the ground. Don’t forget to see the murals painted by Polish artists on the Wall of Art. The museum building is interesting in its own right since it was previously an old electric power plant for trams.

The Old Toy Museum of Mexico offers a vast, rambling and eclectic collection of toys spanning 4 floors. Everything from Barbie to old, rustic hand-made toys, plus a souvenir shop. The presentation appears random at first, but there is intent behind every composition — to peak your attention, overwhelm with the sheer amount of detail, surprise and pluck at the strings of your nostalgia. It's strange and wonderful and totally worth the admission.

If you're interested in watches, this museum houses an important collection of timepieces from the 16th century onward and the finest creations of this Geneva-based watchmaker. Nowhere else is the Swiss passion for clocks, watches and the passing of time as obvious as here.