Tucked inside Peradeniya's botanical gardens, the orchid house is a steamy glasshouse detour that fogged up my camera lens within a minute of walking in.
Hundreds of varieties, crammed into a space you can walk through in fifteen minutes — or an hour, if you keep stopping to photograph the same flower from six angles.
Go straight from the main garden entrance — it's well signposted — and budget a few extra rupees for the separate small entry fee.
Midday is warmest (and steamiest) inside; if you're sensitive to humidity, aim for morning.