(CNN) North Korean leader Kim Jong Un went on a surprise tour of downtown Singapore on Monday night, just hours before he was due to take part in a landmark meeting with US President Donald Trump.

At around 6 p.m. (6 a.m. Monday ET) motorcycles and police vehicles were seen gathering outside the St. Regis Hotel, where the leader is staying during the highly-anticipated summit.

Several hours later, camera crews captured Kim and his entourage entering another luxury hotel on the island: the Marina Bay Sands -- a hotel and entertainment mecca with an infinity pool, lookout point, and the Ce La Vi bar and restaurant on the rooftop.

North Korean state-run Korean Central News Agency reported that Kim enjoyed the "nocturnal bird's-eye view" from the Marina Bay Sands "observation platform."

"He said Singapore is clean and beautiful and every building is stylish as he heard of in the past, adding he is going to learn a lot from the good knowledge and experience of Singapore in various fields in the future," KCNA reported.

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