Tobu World Square is an architectural museum with reproductions of 102 world-famous buildings on the 1/25 scale. It is located near Kinugawa-onsen hot spring in Nikko city. It takes 10 minutes from Kinugawa-onsen station to the museum by bus. The admission fee is 2500 yen ($21.19 €19.23), but you can buy a 2200 yen discount ticket at Kinugawa-onsen station.
I visited the museum in March. The below shows photos of the 1/25 scale structures.
Empire State Building and World Trade Center in the U.S.
White House in the U.S.
Pyramid in Egypt
St.Peter's Basilica in Vatican
Eiffel Tower (France)
Sagrada Famillia Church (Spain)
Big Ben-Houses of Parliament (England)
Angkor Wat (Cambodia)
The Great Wall of China
Kinkaku-ji Golden Pavilion in Japan
Itsukushima Shrine in Japan
It was good for my kids to know famous buildings sterically without visiting the real one.