This was the day I had been so looking forward to. An excursion to the Cu Chi Tunnels outside Ho Chi Minh City or, as the Vietnamese call it, Saigon.
Crashing and banging on the ropes outside my cabin announced Spirit of Adventure's arrival in the city just before 9am on Monday. When I emerged onto the aft deck for breakfast, there was Silversea's Silver Whisper moored up behind us. First other cruise ship I've seen on this trip.
The big cruise ships have to dock way a long way out of town, but Spirit of Adventure was able to sail right up the Saigon River and moor in the city, 85km from the sea. Once we were loaded on our excursion coach, we turned a few corners out of the port and dived into the chaos that is Saigon roads.
There are eight million people in this city and 3.8 million scooters. To cross the road, you should walk slowly and never stop because the drivers will see you and steer around you. At least that's what our guide Vien said. So far I haven't put it to the test.
Drivers have to wear helmets by law. Woman also wear masks against pollution and gloves so they don't get tanned by the sun. "Men want to wear masks too but it's seen as a bit womanly," Vien whispered.
I'll bring you more about Saigon in the next post (we're in the city overnight so it's the city tour tomorrow) because today was the tunnels. They are about two hours' drive outside the city, in the province of Cu Chi, which was a Viet Cong stronghold during the war with the US.
Around 15,000 Viet Cong lived in the province, many of them in these tunnels, where they could hide and leap out at unsuspecting GIs. The entrance to the tunnels was incredibly small - this is me going inside, ready to shut the "door" behind me. I was the only one in our group small enough and agile enough to be able to give it a go. That really made my day!
The others had to make do with going into the tunnels that have been "westernised" - that is, they have made the entrance bigger! You can see once inside, they are still not very big and many either wouldn't try going in or turned back when they realised how small and claustrophobic it would be.

The first tunnels were dug in 1948, when the Vietnamese were fighting to be free of the French. Then there were 20km of tunnel. Twenty years later, they stretched 200km, were on three levels, either three metres, six metres or up to 10 metres below ground, and even ran under an American/South Vietnamese army base at one point.
As well as going inside the tunnels, we were able to see some of the booby traps the Viet Cong used to snare the Americans. It's brutal stuff. This was a pit, camouflaged with grass. When the GIs stood on it, it swung around, they fell in and were pierced by the sharpened bamboo stakes below. And there was a lot more in this vein.
There was also a hospital - well, a bed but no anasthetic where they would operate in an emergency - a workshop where they made weapons and another where they made VC uniforms.
Vien had some fascinating stories from the war. His was an affluent family so he and his sisters had a driver to take them to school and his mother also had a chauffeur to take her around. Turned out one was Viet Cong, the other was CIA, each in a covert job trying to get information about the other side. And neither ever knew who the other was!
After the war ended, life was very tough under the Communists and 90% of the South Vietnamese tried to leave. Remember the boat people?
But by 1985, when the old guard died out and younger people took over the government, things started to improve. And remember I said they call it Saigon? "We won the war as the name is still the same," Vien said.