If you’re driving from Puntarenas or San José, pull over by the Río Tárcoles bridge, also known as Crocodile Bridge. It's a top tourist attraction in the area, as the sandbanks below regularly feature a couple dozen massive, basking crocodiles. They’re visible year-round, but the best time for seeing them is during low tide in the dry season.
Crocodiles this large are rare in Costa Rica as they’ve been hunted vigorously for their leather. However, the crocs are tolerated here as they are the main attractions of wildlife tours that depart from Tárcoles. Note that if your tour guide feeds the crocs, this is illegal and potentially dangerous, as it leads to the crocs losing their fear of humans and equating their presence with food.