We were a bit unsure whether to spend $30 dollars on a guide but without doubt it ended up being one of the best decisions we've made to book a tour with Mario. Booked fairly last minute the night before and there was still availability for the next day, luckily! Took about 3 hours and was amazing. Basically without a guide you look like a muppet as you stroll past almost invisible delights of nature and peer over the shoulders of those who have booked a guide! Mario jut lovely and genuinely passionate. Cannot recommend highly enough.