Condom Museum

The free museum inside the Ministry of Public Health complex in Nonthaburi is not signposted from the street, not listed on any tourist maps and usually sits behind a locked door. None of this should put you off.

Thailand is one of the world's largest condom producers, and this small museum, run by the Department of Medical Sciences, takes that fact seriously. Inside is the full story: manufacturing processes, international distribution and the role of condom campaigns in Thailand's remarkably successful HIV-prevention work from the 1990s onwards. There are thousands of condoms on display in every colour, size, texture and flavour. There is also a room dedicated to testing exactly how far the product can stretch and how much it can hold, which has been entertaining visitors with a completely straight face for decades.

The tonal range here is wider than you might expect from a government health department. It is genuinely educational, genuinely funny and much better than it has any right to be.

The door on the 8th floor of Block 9's northern wing is usually locked. Find staff near the lift who hold the key and they should let you in without ceremony.

Block 9, Department of Medical Sciences, Ministry of Public Health, Tiwanon Rd, Nonthaburi. MRT Purple Line to Ministry of Public Health station, Exit 2. Open Monday-Friday, 8.30am-2.30pm. Closed weekends and public holidays. Free entry.