User blog comment:PokemonTDHTF98/Which location not seen in Ridonculous Race do you want to see?/@comment-26910203-20151014234632

I'll mention some I don't think anyone else has:

Siem Reap, Cambodia (Angkor Wat)

Selangor, Malyasia (Batu Caves)

New Orleans, Louisiana, USA

Cape Town, South Africa (Table Mountain and the cape of course)

Vienna, Austria (Schonbrunn Palace)- Music themed challenge anyone?

Fiji

Pamplona, Spain (Running of the bulls)

Switzerland (Matterhorn)