Parque La Carolina.  (The equipment is for doing 'sit-ups', the angle of the board increases the effort necessary. The one on the left requires least effort whilt the one on the right requires a well developed six-pack. Note the loops at the top of each board to engage the feet of the user. <a href="//commons.wikimedia.org/wiki/User:Richard_Avery" title="User:Richard Avery">Richard Avery</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Richard_Avery" title="User talk:Richard Avery"><span class="signature-talk">talk</span></a>) 14:39, 25 February 2018 (UTC))
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Photography by David Adam Kess
<a href="//commons.wikimedia.org/wiki/User:David_Adam_Kess" title="User:David Adam Kess">David Adam Kess</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>